612. Fool's bolt. A fool's bolt is soon shot.

613. Fools build. Fools build houses, and wise men buy them.

614. Forbearance. Forbearance is no acquittance.

615. Forbidden fruit. Forbidden fruit is sweet.

616. Forced fruits. Forced fruits fail in flavour.

617. Forecast. Forecast is better than work hard.

618. Forego.

Forego, forget, forgive,
Then happy you shall live.

619. Foremost dog. The foremost dog catches the hare.

620. Forewarned. Forewarned is forearmed.