Who said "The problem with love is that it cannot be defined."?

This quote is attributed to Fyodor Dostoevsky.

The problem with love is that it cannot be defined. - Fyodor Dostoevsky

"The problem with love is that it cannot be defined."

Fyodor Dostoevsky Love

Novelist Russian 1821–1881

"Beauty is mysterious, like life itself"

"The soul is healed by making others happy"

"Man can get used to anything, the scoundrel"

"I love humanity, but I wonder at myself sometimes"

"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!"