The first breath of adultery is the freest; after it, constraints aping marriage develop. John Updike
There are no constraints on the human mind, no walls around the human spirit, no barriers to our progress except those we ourselves erect. Ronald Reagan
I am, as I have always been, of the opinion that while the niceties of normal moral constraints should be our guides, they must not be our masters. Iain Banks
The biggest challenge for any craft person or artist is to accept the constraints of their medium and make something beautiful despite them. That's kind of fun, actually. Ayelet Waldman
The more constraints one imposes, the more one frees one's self. And the arbitrariness of the constraint serves only to obtain precision of execution. Igor Stravinsky
I think frugality drives innovation, just like other constraints do. One of the only ways to get out of a tight box is to invent your way out. Jeff Bezos