“Love is like war: easy to begin but very hard to stop.”

“I was very melancholic in the beginning. Then I was very angry. Then I fell in love again — but not stupid like in the beginning.”

“I liked quantum mechanics very much. The subject was hard to understand but easy to apply to a large number of interesting problems.”

“Loving's pretty easy. It's letting someone love you that's hard.”

“It's so easy that when you begin you can't stop. You just go on and on doing it always.”

“It's so easy to love. The only hard thing is to be loved.
[Vincent Van Gogh]”

“It is easy to love people in memory; the hard thing is to love them when they are there in front of you.”

“It is very easy to love alone.”

“Begin at the beginning, the King said, very gravely, and go on till you come to the end: then stop.”

“It's easy to fall in love. The hard part is finding someone to catch you.”