For a creative person there's just as much pleasure in writing an eight-line poem as there is in writing a blockbuster play ... of the old '50s type.

The only unforgivable sin is deliberate cruelty.

The biggest of all differences in this world is between the ones that had or have pleasure in love and those that haven't and hadn't any pleasure in love, but just watched with sick envy.

I'm only really alive when I'm writing.

The theatre is a place where one has time for the problems of people to whom one would show the door if they came to one's office for a job.

The violets in the mountains have broken the rocks.

I have always been pushed by the negative. The apparent failure of a play sends me back to my typewriter that very night, before the reviews are out. I am more compelled to get back to work than if I had a success.