“Do not be embarrassed by your failures, learn from them and start again.” 
Richard Branson

“Watch, listen, and learn. You can’t know it all yourself. Anyone who thinks they do is destined for mediocrity.” 
Donald J. Trump
“In five minutes you should know if people have confirmed, calculated & considered your vision.” 
Onyi Anyado

“You don't have to prove confidence; when you have it, it'll show. 
Real confidence is quiet, tactful, civil, and humble.” 
Rosalinda Oropeza Randall
“It doesn’t matter how many times you fail. It doesn’t matter how many times you almost get it right. No one is going to know or care about your failures, and neither should you. All you have to do is learn from them and those around you because all that matters in business is that you get it right once. Then everyone can tell you how lucky you are.” 
Mark Cuban

“Ideas are easy. Implementation is hard.” 
Guy Kawasaki
“Always deliver more than expected.” 
Larry Page