Charles H. Spurgeon on Psalms 77:6

My spirit made diligent search. As Ahasuerus, when he could not sleep, called for the records and chronicles of his kingdom, so the doubting soul betakes himself to the records of heaven, the word of God in the Scriptures, and one while he is reading there, another while looking into his heart, if he can find there anything that answers the characters of Scripture faith, as the face in the glass doth the face of man. David, when he was at a loss what to think of himself, and many doubts did clog his faith, insomuch that the thinking of God increased his trouble, he did not sit down and let the ship drive, as we say, not regarding whether God loved him or no, but communes with his own heart, and his spirit makes diligent search. Thus it is with every sincere soul under doubting: he dares no more sit down contented in that unresolved condition, than one who thinks he smells fire in his house dares settle himself to sleep till he hath looked in every room and corner, and satisfied himself that all is safe, lest he should be waked with the fire about his ears in the night: and the poor doubting soul is much more afraid, lest it should wake with hell fire about it: whereas a soul in a state and under the power of unbelief is secure and careless. William Gurnall.