A person needs a little madness, or else they never dare cut the rope and be free.

Nikos Kazantzakis (1883–1957) Greek writer and philosopher

Zorba the Greek (1946)

Adapted in the 1964 screenplay by Mihalis Kakogiannis as:

ZORBA: Boss, I like you too much not to say it. You've got everything except one thing: madness! A man needs a little madness, or else.
BASIL: Or else?
ZORBA: Or else, he never dares cut the rope and be free.