Because you are important to the mix. You add to the diversity. You are a tomato slice in the big salad of life.

You add substance and flavor especially to those you are near. It wouldn't be the same without you.
(Please don't start a religion based on eating salad. It's just a metaphor.)

You are a note in the symphony, a beat in the song, an actor in the play.
(All metaphors! Although a religion based on music, theater, and salad would probably be better than most.)

You get the idea. We'd miss you if you weren't here. I'd miss you, that is for sure.

You are here to do those little things throughout the day that make life worth living for others. You are here to lighten the load.

You are here to love back. If that's not a reason to live, what is? More later. Be kind. Love, God