Usage is the only test. I prefer a phrase that is easy and unaffected to a phrase that is grammatical.
It is a nuisance that knowledge can only be acquired by hard work.
Life isn't long enough for love and art.
The nature of men and women - their essential nature - is so vile and despicable that if you were to portray a person as he really is, no one would believe you.
Loving-kindness is the better part of goodness.
I don't know why it is that the religious never ascribe common sense to God.