Who said "The work of a generation is what we do now."?

This quote is attributed to John F. Kennedy.

The work of a generation is what we do now. - John F. Kennedy

"The work of a generation is what we do now."

John F. Kennedy

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."