And we must face the fact that the United States is neither omnipotent or omniscient — that we are only six percent of the world’s population — that we cannot impose our will upon the other ninety-four percent of mankind — that we cannot right every wrong or reverse each adversity — and that therefore there cannot be an American solution to every world problem.

John F. Kennedy (1917–1963) American politician, author, journalist, US President (1961–63)

Speech, University of Washington, Seattle (16 Nov 1961)