Quote by Colin Powell
"Never underestimate the power of a simple thank you."
More from Colin Powell
"A soldier's greatest strength is not the weapon he carries, but the principles he stands for."
"Don't bother people for help unless you have first tried to solve the problem yourself."
"There are no secrets to success. It is the result of preparation, hard work, and learning from failure."
"My own experience is that once you start running, everyone assumes you're an athlete."