Assuming, as you grow older, that you're the guardian of the world's wisdom, even if you haven't necessarily lived enough to know what's right and wrong.
Accept what life offers you and try to drink from every cup. All wines should be tasted; some should only be sipped, but with others, drink the whole bottle.
Look at children. Of course they may quarrel, but generally speaking they do not harbor ill feelings as much or as long as adults do. Most adults have the advantage of education over children, but what is the use of an education if they show a big smile while hiding negative feelings deep inside? Children don�t usually act in such a manner. If they feel angry with someone, they express it, and then it is finished. They can still play with that person the following day.
Think'st thou I'd make a life of jealousy, To follow still the changes of the moon With fresh suspicions? No; to be once in doubt Is once to be resolved.
The only faults considered grave are the following: not respecting the rights of one's neighbor, letting oneself be paralyzed by fear, feeling guilty, thinking one does not deserve the good and bad which occurs in life, and being a coward.