If you’re not a liberal when you’re 25, you have no heart. If you’re not a conservative by the time you’re 35, you have no brain.

Winston Churchill (1874-1965) British statesman and author

(Spurious)

This hasn't been found in Churchill's writings, and is generally believed by researchers (and the Churchill Centre) to be spurious. It's also misaligned with the ideological cycle of Churchill's own career.

See Clemenceau for more discussion about this general quotation form.