This is a tattoo I'm really considering getting. I'm well into tattoos that have meaning and I like this one. It means: "If there are no ups and downs in your life, it means you are dead."
It really is true and it's encouraging you to think positively about life. Yes we love it when things go our way and get annoyed and sad when they don't, but it's about accepting the things we can't change and making the best out of the things we can because usually, there's someone worse off than you.
Disclaimer: This is not my image