Of Physics and Funerals
This is a good start. For secular folks it really works and is beautiful as it stands.
I've even done one on star stuff -- as stars live, they are very far apart and everything is quite ephemeral. When they die, their bones are blasted out through space to coalesce into and around new stars. This process begets planets, which are the heaven of stars; and the life upon them, that's us, we are the angels. We are what stars become after they die. Why wouldn't we look up and think of them as home?
For me, life after death isn't faith, and it's not just memory either. It's observation. It's looking around the universe and seeing that everything exists within systems, within cycles. Nothing is lost; everything is retained; it simply changes form. Some of those changes are really exciting. Just because we can't see the whole of a given cycle from the point we're standing in doesn't prevent us from mapping the part of it we can see, and that part tells us by its shape that it is incomplete and so there must be more which will only come into view after we have moved ahead some distance. You can't see out of a womb when you're in it, either.
Faith is believing what you've been told. Extrapolation is using what you already know to predict the parts you can't get at yet.
And funerals, well, they're for the community to patch up the hole that's left behind, and to make sure that the departed energy has in fact departed and isn't going to stick around loose to cause problems. Do whatever works for you in that regard.