"Having a compassionate attitude is the ultimate basis for living a happy life."
(From His Holiness the Dalai Lama's tweet on October 7, 2013)
Cf. https://twitter.com/DalaiLama/status/387147761830752256
「思いやりのある態度を取ることは、幸福な人生を送るための究極の基礎です。」 (超訳)
Because compassion is the source of mental happiness for both ourselves and others. (My commentary)
Cf. http://www.slideshare.net/compassion5151/compassion-reason
なぜなら、思いやりは自他共にとって精神的な幸せの源だからです。(解説)
参考:http://www.slideshare.net/compassion5151/ss-24753750