"The first thing to bear in mind is that marriage cannot give perfect happiness, nor can anything else here on earth. The purpose of marriage is not to give the spouses such happiness, but to mature them for it."
"Happiness is not possible inside or outside marriage for the person who is determined to get more than he or she is prepared to give."
"We will never get started on the way to happiness until we realize that the main obstacle is our own self -- our self-centered concerns, worries and calculations. Paradoxically all these are absolute obstacles to personal happiness. "
Sounds to me that one could substitute the word "life" for "marriage" and still be on the money.
