As the hart panteth after the water brooks, so panteth my soul after thee, O God. My soul thirsts for God, for the living God: when shall I come and appear before God? My tears have been my meat day and night, while my... while they continually say unto me, Where is thy God?

I think David, in the writing of this Psalm, must've been in distress. And it usually takes distress to bring the best out of a man. And gets down to when we fast, many times, to get ourself in position to get ourself out of the way. And I think, when David got in these places, then he begin to meditate on the Lord, begin to think about the things.
Many times, God gets us in--in tight corners where we have to look up. Sometimes we even have to get on our back in the hospital, or a bed somewhere, so we can look up to see where the great blessings of God comes from.

William Branham, Sermon "Thirst"
http://www.en.branham.ru/sermons/65-0919‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌‌