Vimalakirti Nirdesa Sutra
Chapter 7: Looking at Living Beings (10)
Manjusri asked: “What should be his joy (mudita)?” Vimalakirti replied: He should be filled with joy on seeing others win the benefit of the Dharma with no regret whatsoever.”
Chapter 6: The Perfect Long-Suffering (14)
If some find delight in praising one of high worth, why, 0 my spirit, dost thou not rejoice likewise in praising him? Such joy will bring thee no...
(14) If some find delight in praising one of high worth, why, 0 my spirit, dost thou not rejoice likewise in praising him? Such joy will bring thee no blame; it will be a fountain of happiness; it is not forbidden by men of worth; it is the noblest way to win over thy fellows. If thou art not pleased because he [who praises] is glad, then thou wouldst forbid such things as payment for service, and seen and unseen rewards alike perish. Thou art willing for thy neighbour to be glad when he praises thy worth; but thou art loth to be thyself glad when another's worth is praised. Thou hast framed the Thought of Enlightenment in desire to make all creatures happy: then why now art thou wroth with creatures who of themselves find happiness? Forsooth thou wouldst have all beings become Buddhas, and worthy of the three worlds' worship; then why art thou vexed to see their brief honours? He who nurtures them that thou shouldst nurture gives to thee; yet when thou findest one that feeds thy household, thou art wroth, not glad! He that desires the enlightenment of living beings desires all good for them; but whence can one have the Thought of Enlightenment who is angered at another's good fortune? If the gift comes not to thy neighbour, it stays in the house of the offerer; in no wise does it fall to thee: what matter to thee whether it be given or no? Shall he check his righteousness, the kindness of others, or his own worth? shall he not take what is given? say, art thou not angered in every case? Not only wilt thou not grieve for thine own sins, but thou darest to be jealous of the righteous. If sorrow could befall thine enemy at thy pleasure, what would come of it? Thy mere ill-will cannot bring forth an issue without a cause; but if it were accomplished by thy wish, what happiness wouldst thou have in his grief? The issue then would be more harmful to thee than aught else.