Usage is the only test. I prefer a phrase that is easy and unaffected to a phrase that is grammatical.

When you have loved as she has loved, you grow old beautifully.

It has been said that good prose should resemble the conversation of a well-bred man.

At a dinner party one should eat wisely but not too well, and talk well but not too wisely.

I made up my mind long ago that life was too short to do anything for myself that I could pay others to do for me.

Genius is talent provided with ideals. Genius starves while talent wears purple and fine linen. The man of genius of today will infifty years' time be in most cases no more than a man of talent.

It does the heart good to look at you.