If you literally came into the presence of God you would faint (die), because He is so powerful and so glorious, and every other powerful thing.
To come near to God in understanding you can't help but fear Him because you realise how powerful He is. The good thing is that you also realise that He is love and wants to save us. It is like a reverence and respect for Him.
Ecc 12:13 Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.
Rev_14:7 Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters.