Prescription for Contentment

This was shared with me, by a friend .... I was told it is from the book "Calm My Anxious Heart" by Linda Dillow:

Prescription for contentment

1. Never allow yourself to complain about anything (not even the weather).
2. Never picture yourself in any other circumstance or someplace else.
3. Never compare your life with anothers'.
4. Never allow yourself to wish this or that had been otherwise.
5. Never dwell on tomorrow, remember that it is God's and not ours.