The heart of those that seek God shall rejoice. Seek God and His might, constantly seek His countenance (Psalms 105:3-4).
One might ask, "Why should I try to seek God? He is infinitely great, and so totally beyond human grasp that the search to understand Him is all in vain. Is it not senseless to exhaust oneself in an effort that is doomed to failure from its very outset?"
Rabbi Simcha Zissel of Kelm states that the above verses are the Psalmist's reply to this question. Spiritual quests are qualitatively different from physical ones. In worldly matters, a quest is futile if one finds nothing, and the disappointment is frustrating. Not so in one's search for God, wherein the search itself brings joy, for the very inquiry elevates the searcher.
Indeed, the Psalmist urges us never to cease the search, because the promise of joy in searching is contingent upon its continuity. One cannot stop midway, abandon the effort, and retire with one's winnings. Abandoning the search for God at any point brings a person back to square one. To achieve the joy in searching, it must be constantly seek His countenance.
This thought was also expressed by the Rabbi of Kotzk, on the verse, And from there you shall seek your God, and you shall find Him, if you seek Him with all your heart and soul (Deuteronomy 4:29). The Kotzker interpreted the verse to mean that the seeking is the finding; "you shall find Him if you seek ..." - but only if it is a lifelong quest, with all one's heart and soul.