It's fine as a light contemplation on the mystery of existence. I think it might benefit from a line or two of either doubt or the offer of some kind of answer for existence. That might add a bit of gravitas. Or framing it with some event that prompts you to consider this big question.
Structurally, it's fine and I get the sense it will have a very pretty melody, especially at the chorus. Right now, though, it's only missing that moment of revelation or illumination.
Find that and your lyric goes from nice to special.