Who said "If thou hast loved, thou knowest the measure of thy heart."?

This quote is attributed to Lord Byron.

If thou hast loved, thou knowest the measure of thy heart. - Lord Byron

"If thou hast loved, thou knowest the measure of thy heart."

Lord Byron Love

Poet English 1788–1824

"She walks in beauty, like the night"

"There is a pleasure in the pathless woods"

"The great object of life is sensation"

"Love will find a way through paths where wolves fear to prey"

"I love my wife, but sometimes she drives me crazy."

"Love conquers all obstacles."

"Love is patient, love is kind."

"I'm not stupid, I'm just in love!"