“The gym is always open, except when it's closed.”

“Moral wounds have this peculiarity - they may be hidden, but they never close; always painful, always ready to bleed when touched, they remain fresh and open in the heart.”

“Do not close the circle. Leave it open. Descartes closes the circle. Pascal leaves it open. Rousseau's triumph over the encyclopedists is to have left his circle open when they closed theirs.”

“Any restrictions to freedom of expression will always open the door to possible others, because analogical reasoning can mount arguments showing why this or that class of objects is closely similar to those for which exceptions have been made.”

“When one door is closed, many more is open.”

“When one door closes, fortune will usually open another.”

“This is the shade of meaning: the door of a physician should never be closed; the door of a priest should always be open.”

“Open eyes are of little use when the mind behind them is closed.”

“When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.”

“When God closes a door, he opens a window, but it's up to you to find it.”