To do something virtuous with a commonplace motive will certainly bring us some happiness, but only temporarily. Such happiness will soon be gone, and our helpless roaming in samsara will continue. If, on the other hand, everything we do, say, and think is transformed by bodhichitta, our happiness will go on and on increasing and never be exhausted. The fruit of actions motivated by bodhichitta, unlike that of positive actions done with less noble motives, can never be destroyed by anger or other negative emotions.
– Dilgo Khyentse Rinpoche
from the book “The Heart Treasure of the Enlightened Ones”