I think he means that "sooner or later" all things will pass, and it'll happen "before your very eyes". Youth is soon frittered away... love lost... we grow old and die...the end of the world may soon be upon us, etc.
His warning to the listener (or his younger self) is: don't waste a moment or you will be filled with regret for those things you didn't do. Doesn't matter so much if you f*ck up, because we're human and everybody makes mistakes... that's where "book of forgiveness" comes into play.
I think he means that "sooner or later" all things will pass, and it'll happen "before your very eyes". Youth is soon frittered away... love lost... we grow old and die...the end of the world may soon be upon us, etc.
His warning to the listener (or his younger self) is: don't waste a moment or you will be filled with regret for those things you didn't do. Doesn't matter so much if you f*ck up, because we're human and everybody makes mistakes... that's where "book of forgiveness" comes into play.