I agree with you that we are fortunate that we can consider these things. However, One of the reasons I think there are more cases of depression and or mental illness in humans is because we have so much time to just think.
Over the course of our species evolution I don't think there was as much time to just sit and think. It was a day to day struggle just to live.
Life can have meaning because you choose for it to have meaning.
There's a lot to think about in that statement.
Some people may believe that a deity has spoken to them, but this is an unprovable statement.
For me, when I hear a preacher, for example, say, "God told me that.." my BS meter goes up.
But I do think we have a relationship to or with something that transcends; there's an interaction and communication of a kind. Of course, that's an unprovable statement too. :)
In general, do you think something can be true but unprovable?