Purpose? No idea what it is.

[Angrboda]

Yes, in 5 billion years, nothing you do will matter at all. Probably much sooner than that.

But, a candle flame doesn't lose its purpose of giving light and heat simply because it is blown out. And I don't lose my purpose of learning, loving, helping, etc simply because I die.

From what I can see, *real* purpose is local: it happens here and now. To worry about a lack of 'ultimate' purpose is then simply a mistake: you are missing the good stuff right here and misunderstanding what a 'purpose' really means.

It's always seemed rather egotistical to think that anything I do will have 'ultimate' consequences.

It may not necessarily require ultimate consequences to make something meaningful, but that's not to say that having ultimate significance isn't an order of magnitude better than not having it.