And one cried unto another, and said, Holy, holy, holy, is the LORD of hosts: the whole earth is full of his glory.
Isaiah 6:3

Exodus 15:11
Who is like unto thee, O LORD, among the gods? who is like thee, glorious in holiness, fearful in praises, doing wonders?

Revelation 15:4
Who shall not fear thee, O Lord, and glorify thy name? for thou only art holy: for all nations shall come and worship before thee; for thy judgments are made manifest.

I Samuel 2:2
There is none holy as the LORD: for there is none beside thee: neither is there any rock like our God.

Psalm 30:4
Sing unto the LORD, O ye saints of his, and give thanks at the remembrance of his holiness.

I Corinthians 3:16-17
Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you?
17 If any man defile the temple of God, him shall God destroy; for the temple of God is holy, which temple ye are.

John 1:29
The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.

I Peter 1:18-19
Forasmuch as ye know that ye were not redeemed with corruptible things, as silver and gold, from your vain conversation received by tradition from your fathers;
19 But with the precious blood of Christ, as of a lamb without blemish and without spot:

Hebrews 9:12-14
Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us. 13 For if the blood of bulls and of goats, and the ashes of an heifer sprinkling the unclean, sanctifieth to the purifying of the flesh: 14 How much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God?

What is the relevancy of God's holiness?

Peace
Job 22:21
Acquaint now thyself with him, and be at peace: thereby good shall come unto thee.

Strength
Daniel 11:32
And such as do wickedly against the covenant shall he corrupt by flatteries: but the people that do know their God shall be strong, and do exploits.

Freedom
John 8:32
And ye shall know the truth, and the truth shall make you free.

Proverbs 9:10
The fear of the LORD is the beginning of wisdom: and the knowledge of the holy is understanding.

2 Corinthians 5:15
And that he died for all, that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again.

Approaching a Holy God

Romans 3:10, 23
As it is written, There is none righteous, no, not one:
23 For all have sinned, and come short of the glory of God;

Romans 5:6-9
And hope maketh not ashamed; because the love of God is shed abroad in our hearts by the Holy Ghost which is given unto us.
6 For when we were yet without strength, in due time Christ died for the ungodly.
7 For scarcely for a righteous man will one die: yet peradventure for a good man some would even dare to die.
8 But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.
9 Much more then, being now justified by his blood, we shall be saved from wrath through him.

Ephesians 1:7
In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace;

John 14:6
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.

I John 5:11-12
And this is the record, that God hath given to us eternal life, and this life is in his Son.
12 He that hath the Son hath life; and he that hath not the Son of God hath not life.

Romans 3:22
Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference:

Colossians 1:22
In the body of his flesh through death, to present you holy and unblameable and unreproveable in his sight:

Hebrews 4:16
Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.

Isaiah 57:15
For thus saith the high and lofty One that inhabiteth eternity, whose name is Holy; I dwell in the high and holy place, with him also that is of a contrite and humble spirit, to revive the spirit of the humble, and to revive the heart of the contrite ones.

Purpose

Ephesians 1:3-4
Blessed be the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessings in heavenly places in Christ:
4 According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love:

2 Timothy 1:9
Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began,

I Peter 1:16
Because it is written, Be ye holy; for I am holy.

True Beauty

Psalm 27:4
One thing have I desired of the LORD, that will I seek after; that I may dwell in the house of the LORD all the days of my life, to behold the beauty of the LORD, and to enquire in his temple.

Psalm 110:3
Thy people shall be willing in the day of thy power, in the beauties of holiness from the womb of the morning: thou hast the dew of thy youth.

I Timothy 2:8-11
I will therefore that men pray every where, lifting up holy hands, without wrath and doubting.
9 In like manner also, that women adorn themselves in modest apparel, with shamefacedness and sobriety; not with broided hair, or gold, or pearls, or costly array;
10 But (which becometh women professing godliness) with good works.
11 Let the woman learn in silence with all subjection.

Exodus 28:2
And thou shalt make holy garments for Aaron thy brother for glory and for beauty.

Psalm 96:6-9
Honour and majesty are before him: strength and beauty are in his sanctuary.
7 Give unto the LORD, O ye kindreds of the people, give unto the LORD glory and strength.
8 Give unto the LORD the glory due unto his name: bring an offering, and come into his courts.
9 O worship the LORD in the beauty of holiness: fear before him, all the earth.

I Timothy 2:9-10
In like manner also, that women adorn themselves in modest apparel, with shamefacedness and sobriety; not with broided hair, or gold, or pearls, or costly array;
10 But (which becometh women professing godliness) with good works.

I Peter 1:16
Because it is written, Be ye holy; for I am holy.

I Peter 3:3-5
Whose adorning let it not be that outward adorning of plaiting the hair, and of wearing of gold, or of putting on of apparel;
4 But let it be the hidden man of the heart, in that which is not corruptible, even the ornament of a meek and quiet spirit, which is in the sight of God of great price.
5 For after this manner in the old time the holy women also, who trusted in God, adorned themselves, being in subjection unto their own husbands:

Colossians 1:21-22
And you, that were sometime alienated and enemies in your mind by wicked works, yet now hath he reconciled 22 In the body of his flesh through death, to present you holy and unblameable and unreproveable in his sight:

Application

Romans 12:1-2
I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.
2 And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.

2 Corinthians 7:1
Having therefore these promises, dearly beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God.

I Thessalonians 3:12-13
And the Lord make you to increase and abound in love one toward another, and toward all men, even as we do toward you: 13 To the end he may stablish your hearts unblameable in holiness before God, even our Father, at the coming of our Lord Jesus Christ with all his saints.

Hebrews 12:10
For they verily for a few days chastened us after their own pleasure; but he for our profit, that we might be partakers of his holiness.

Holy Heart-Attitude

Psalm 51:17
The sacrifices of God are a broken spirit: a broken and a contrite heart, O God, thou wilt not despise.

Isaiah 66:2b
but to this man will I look, even to him that is poor and of a contrite spirit, and trembleth at my word.

Hebrews 12:14
Follow peace with all men, and holiness, without which no man shall see the Lord: