God demonstrates His perfection through the Ten Commandments. Ever lied, stolen, lusted? Jesus said to look with lust He considers to be adultery in the heart.
Knowing, therefore, the terror of the Lord, we persuade men. 2 Corinthians 5:11
"He who believes in the Son has everlasting life; and he who does not believe the Son shall not see life, but the wrath of God abides on him." John 3:36
"All have sinned and fall short of the glory of God." Romans 3:23