Jealousy comes from counting others' blessings instead of our own. So very true, don't let your life pass by while you worry about someone else, count your blessings, be grateful, be happy for others (even though it can be hard).
Everything in life is temporary. So if things are going good, enjoy it because it won't last forever. And if things are going bad, don't worry. It can't last forever either. The best collection of quotes and sayings for every situation in life.