Adam Clarke on Psalms 11:4

The Lord is in his holy temple - He is still to be sought and found in the place vhere he has registered his name. Though the priests be destroyed, the God in whose worship they were employed still lives, and is to be found in his temple by his upright worshippers. And he tries the heart and the reins of both sinners and saints. Nothing can pass without his notice. I may expect his presence in the temple; he has not promised to meet me in the mountain.