A kind heart and compassion are the real sources of peace and happiness; this compassion, when you enhance it to its fullest potential by employing the right skillful means through meditation, marks the realization of a universal compassion. When such a compassion is further complemented by the factors of wisdom and intelligence, then you will achieve a state called buddhahood in which you totally sacrifice yourself for the benefit of others; such a compassion and kind heart are really priceless and most precious.
— His Holiness The Dalai Lama, The Path to Bliss by His Holiness The Dalai Lama, Christine Cox, editor