Dalai Lama- Tolerance

In order to practice genuine compassion or altruism, we need tolerance.  Without tolerance, it is impossible to practice.  Anger and hatred are the greatest obstacles to compassion and love.  To minimize anger and hatred, tolerance is the key factor.  In order to practice tolerance we need an enemy.  Because of our enemy's actions we get the opportunity to practice tolerance.

Reference~The Essential Dalai Lama