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.