All the suffering in the world comes from seeking pleasure for oneself. All the happiness in the world comes from seeking pleasure for others.
ShantidevaIf the problem can be solved why worry? If the problem cannot be solved worrying will do you no good.
ShantidevaThose desiring to escape from suffering hasten right toward suffering. With the very desire for happiness, out of delusion they destroy their own happiness as if it were an enemy
ShantidevaAll those who are unhappy in the world are so as a result of their desire for their own happiness. All those who are happy in the world are so as a result of their desire for the happiness of others.
Shantideva