Question

I recently had a chance to read Noa Yaron-Dayan’s book Mikimi, in which she describes her process of becoming religious.
While browsing online I saw a post criticizing the book (though praising its sincere and touching writing), saying that there is no intellectual argument in what she says, and that all her motives for becoming religious are based on various emotions. To be honest, at first I pretty much agreed with that criticism, but on second thought I think that isn’t quite accurate. The main point that comes through in the book, in different ways, is the sense (which, as I understand it, is both intellectual and emotional) 1. that there must be some purpose to our lives, and 2. that this purpose is not pleasure, fun, work, family, etc., but something more elevated. Again, in my opinion this may sound like an emotional argument, but it also contains a very basic intuition. All the colorful descriptions in the book only sharpen, highlight, and illustrate these points. Am I right? Is there room to bring a proof for the existence of a religious God from the claim that there must be some purpose to our existence in the world?