I'll take that saying, rather than leave it, since the underlying philosophy is so positive and empowering, and I can definitely use it.
Stuff we can't use is a waste of time.
A similar related philosophy is "Swim in Your Own Lane."
It's pointless to try to swim in the fast lane if you are wearing water wings.
Doing our best, wherever we are in life, each day, is all we need to do. And if we all do that, the Steem block chain will derive maximum thrust from all our combined contributions. :)