Profundity

I'm trying to write a speech. Auditions for graduation speakers are next Tuesday, and I don't even have one word yet. I want to talk about "truth." I believe in it. With all my heart. But I'm having a hard time picking out the reasons for seeking it. Why have I sought it? Why will I continue to? Why should others do the same? I believe that my speech should answer these questions. It also should speak specifically to each of the graduates, the parents/relatives/family friends, and the administration/teachers. It should avoid clichés while remaining classic and more or less timeless. I want it to have the power to bring tears to at least one individual's eyes. You'd think that with the 500 odd speeches I've given in high school, this one would be a breeze. But I'm not trying to win anything here, although I guess in a way I'll be trying to pursuade, I'll be speaking my mind, not just arguing for the hell of it. I'm not used to that.