Kurt Vonnegut: Be soft. Do not let the world make you hard. Do not let the pain make you hate. Do not let the bitterness steal your sweetness. Take pride that even though the rest of the world may disagree, you still believe it to be a beautiful place.
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).