A penny for your thought!
Notes from Wikiquote
Also in Lyly, Euphues (1579)
Love is a lock that linketh noble minds,
Faith is the key that shuts the spring of love.
A noble mind disdains to hide his head,
And let his foes triumph in his overthrow.
Quote text and notes from Wikiquote: Robert Greene (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.