You owe reality nothing and the truth about your feelings everything.
Scholars look for final truths they will never find. Creative writers concern themselves with possibilities that are always there to the receptive.
Don't write with a pen. Ink tends to give the impression the words shouldn't be changed.
If you want to communicate, use the telephone
Don't write love poems when you're in love. Write them when you're not in love.
Never want to say anything so strongly that you give up the option of finding something better. If you have to say it, you will.