Who said "To be patient is to be the master of time."?

This quote is attributed to John F. Kennedy.

To be patient is to be the master of time. - John F. Kennedy

"To be patient is to be the master of time."

John F. Kennedy Patience

U.S. President American 1917–1963

"Ask not what your country can do for you – ask what you can do for your country."

"The only thing we have to fear is fear itself."

"Change is the law of life."

"Effort and courage are not enough without purpose and direction."

"Patience is a virtue I'm still learning."

"I may be a redhead, but I'm not a hothead."

"Patience is a virtue."

"Patience is a virtue I never learned."