Get busy living or get busy dying

what does that phrase mean?

That attitude is important?

Bob Dylan, in his song It's Alright Ma, I'm Only Bleeding, has it thatL

...he not busy being born
Is busy dying.

I don't know if that's where your question originated from or if that idea has been expressed before that.

Anyway, while interpreting Bob Dylan's lyrics can often be a mug's game, I've always interpreted that to mean - if you aren't getting on with life and making the most of it you are wasting your gifts.