The Secret of Life...

I don't know, but I've been told / That I will die when I grow old / And all that I have will then be lost / My family, friends and things that cost / Should I live my life as bold as can be? / Is what I leave what's left of me? / Or is there a future beyond the grave? / And should I work my soul to save? / If there is an answer to be found / Will I find it in the ground? / Perhaps I should open my eyes to look / There may be something in this book