We men may say more, swear more, but indeed
Our shows are more than will, for still we prove
Much in our vows, but little in our love.

– William Shakespeare

Twelfth Night, Act 2, Scene 4. Viola, disguised as Cesario, discuss with Orsino the different ways men and women love. She says that men make more of a show with declarations of love, but women are more constant and faithful in love.