Who said "A statesman must think in terms of decades, not days."?

This quote is attributed to Lord Palmerston.

A statesman must think in terms of decades, not days. - Lord Palmerston

"A statesman must think in terms of decades, not days."

Lord Palmerston Leadership

Prime Minister, Politician British 1784–1865

"The function of government is to calm, not to excite the passions of the people."

"I therefore fearlessly challenge the verdict which this House is going to give."

"Politics is the art of the possible."

"The British people are as much attached to their freedom and independence as any people in the world."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"