God is utterly holy, and His law therefore demands perfect holiness.

I am the LORD your God; consecrate yourselves and be holy, because I am holy. Do not make yourselves unclean by any creature that moves about on the ground. I am the LORD who brought you up out of Egypt to be your God; therefore be holy, because I am holy. Lev 11:44 - 45

He is a holy God; He is a jealous God. He will not forgive your rebellion and your sins. Josh 24:19

There is no one holy like the LORD;
there is no one besides You;
there is no Rock like our God. 1 Sam 2:2

Who can stand in the presence of the LORD, this holy God? 1 Sam 6:20

The LORD is in His holy temple;
the LORD is on His heavenly throne.
He observes the sons of men;
His eyes examine them.
The LORD examines the righteous,
but the wicked and those who love violence
His soul hates.
On the wicked He will rain
fiery coals and burning sulfur;
a scorching wind will be their lot.
For the LORD is righteous,
He loves justice;
upright men will see His face. Ps 11: 4 -7

for it is written: "Be holy, because I am holy." 1 Pet 1:16

without holiness no one will see the Lord. Heb 12.14

Because He is holy, God hates sin.

You shall not bow down to them or worship them; for I, the LORD your God, am a jealous God, punishing the children for the sin of the fathers to the third and fourth generation of those who hate Me, Exodus 20:5

You are not a God who takes pleasure in evil;
with you the wicked cannot dwell. Ps 5:4

God is a righteous judge,
a God who expresses His wrath every day. Ps 7:11 (note: against the wicked)

Sinners cannot stand before Him

Therefore the wicked will not stand in the judgment,
nor sinners in the assembly of the righteous. Ps 1:5

The arrogant cannot stand in Your presence;
You hate all who do wrong. Ps 5:5

Who may ascend the hill of the LORD?
Who may stand in His holy place?
He who has clean hands and a pure heart,
who does not lift up his soul to an idol
or swear by what is false. Ps 24: 3-4

Of God and men
Of God's holiness
Of men's sin
Of Jesus Christ and what He did
Of God's call to sinners
Of counting the cost first
Of trusting in Jesus