Boston Celtics great, Bill Russell, the man with 11 NBA championship rings for 10 fingers, touches on developing an ‘outside-in’ versus ‘inside-out’ leadership style in his book ‘Russell Rules’.

Here’s one of the ways he shared for business leaders, basketball coaches and players to use when they’re thinking about leadership:

Remember the five most important words: “I am proud of you.”

Remember the four most important words: “What is your opinion?”

Remember the three most important words: “I appreciate that.”

Remember the two most important words: “Thank you.”

And remember the most important word: “You.”

—Bill Russell

SOURCE: ‘Russell Rules: 11 Lessons on Leadership from the Twentieth Century’s Greatest Winner’