Since you're arguing for truth, might I ask what truth is outside of your personal existence? Do you not think the Descartes problem applies to your worldview? In my worldview, Jesus Christ is the way, the truth, and the life. There is a sense in which He embodies truth, He exists outside of my person, yet communicates, reveals Himself to me. So there is a sense in which God is objective truth, and being made in His image, having a point of contact with truth outside of self. Otherwise there is no point of contact with objective truth, that is truth outside of self interpretation. Christianity is a revealed religion, where God has condescended to man, revealing Himself to men throughout history, preserving in writing accounts of His interactions with men.
Although you have a point, the problem with it is simply this, take the account of Saul/Paul on the road to Damascus, he was a Pharisee of Pharisees, he believed in God, and thought he was serving Him, he was not searching for meaning or searching for reasons to believe in Christ, quite the contrary, he thought he had it and would do a service for Judaism to rid the Jewish world of Christianity, but Jesus Christ knocked him off his horse and blinded him, Christ revealed Himself to Saul/Paul, and the rest is as they say history.
One other thought, giving life meaning as a reason is kind of a non sequitur, because all of our lives have meaning in the final analysis of things, and your position would seem to assume that ultimately life is not meaningful. And there are many reasons to believe, chiefly because of the work of the Spirit of God in regeneration instantanously convinces a person, but like I said earlier about regeneration...