Fear of God is huge.

The correct fear of God is terror. Extreme fear and dread of displeasing God and provoking Him to wrath.

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;