Who.

1 Samuel 3:4-10
Then the LORD called to Samuel, and he answered, "Here I am." . . .

1 Timothy 1:13
I was formerly a blasphemer, a persecutor, and a violent man; yet because I had acted in ignorance and unbelief, I was shown mercy.

I am.

Acts 26:9
So then, I too was convinced that I ought to do all I could to oppose the name of Jesus of Nazareth.

it is.

Acts 5:39
But if it is from God, you will not be able to stop them. You may even find yourselves fighting against God."

Deuteronomy 32:15
But Jeshurun grew fat and kicked--becoming fat, bloated, and gorged. He abandoned the God who made him and scorned the Rock of his salvation.

Job 9:4
God is wise in heart and mighty in strength. Who has hardened himself against Him and prospered?

Job 40:9, 10
Do you have an arm like God's? Can you thunder with a voice like His? . . .

Psalm 2:12
Kiss the Son, lest He be angry and you perish in your rebellion, when His wrath ignites in an instant. Blessed are all who take refuge in Him.

Isaiah 45:9
Woe to him who quarrels with his Maker--one clay pot among many. Does the clay ask the potter, 'What are you making?' Does your work say, 'He has no hands'?

1 Corinthians 10:22
Are we trying to provoke the Lord to jealousy? Are we stronger than He?