Fear of God is huge.

The correct fear of God is terror. Extreme fear and dread of displeasing God and provoking Him to wrath. No one, nothing is more dangerous than God. So your biggest fear of all must be fear of God.

Psalm 88:15-17 KJV

[15] I am afflicted and ready to die from my youth up: while I suffer thy terrors I am distracted.

[16] Thy fierce wrath goeth over me; thy terrors have cut me off.

[17] They came round about me daily like water; they compassed me about together.

2 Corinthians 5:9-11A KJV

[9] Wherefore we labour, that, whether present or absent, we may be accepted of him.

[10] For we must all appear before the judgment seat of Christ; that every one may receive the things done in his body, according to that he hath done, whether it be good or bad.

[11] Knowing therefore the terror of the Lord, we persuade men;