I had a business coach one time that actually said that if your effort is 70%, then it's good enough. Now I know why the program was disorganized and the members were in the dark constantly about what to do next. There was no spirit of excellence involved in this person's guidance. She was all about mediocrity and cutting slack.
Mediocrity never built the Brooklyn Bridge.
Mediocrity never built Apple Computers.
Mediocrity never built a 747.
Mediocrity never built a Martha Stewart empire.
Mediocrity never wrote the Word of God.
I'm not saying that everything a human does has to be 100% perfect. That's an extreme that can cause stress that no person can successfully handle.
But to shoot for 70% and hope it lands is NOT who God created us to be.
He created us to strive for excellence in all that we do, because we are a reflection of Him and He is NOT the God of mediocrity... He is the God of EXCELLENCE.
Do you see a man skillful in his work? He will stand before kings; he will not stand before obscure men. ~ Proverbs 22:29