'Presence of God' in the Bible

My soul is athirst for God, yea even for the living God; when shall I come to appear before the presence of God?

Like as the smoke vanisheth, so shalt thou drive them away; and like as wax melteth at the fire, so shall the ungodly perish at the presence of God.

the earth shook, and the heavens dropped at the presence of God, even as Sinai also was moved at the presence of God, who is the God of Israel.

And the angel answered, and said unto him, "I am Gabriel that stand in the presence of God, and am sent to speak unto thee: and to show thee these glad tidings.