We cannot learn real patience and tolerance from a guru or a friend. They can be practiced only when we come in contact with someone who creates unpleasant experiences. According to Shantideva, enemies are really good for us as we can learn a lot from them and build our inner strength.
Dalai LamaEven if only a few individuals try to create mental peace and happiness within themselves, and act responsibly and kind-heartedly towards others, they will have a positive influence in their community.
Dalai LamaIf there's good, strong evidence from science that such and such is the case and this is contrary to Buddhism, then we will change.
Dalai Lama