What is true patience and how can we develop it? Patience is imperturbability in the face of harm and hardship. Responding to these difficulties with anger is extremely destructive because it creates unpleasant consequences and destroys positive energy. There is no austere practice to equal the practice of patience, which calms the turbulence of the disturbing emotions. It is cultivated in meditation and implemented in everyday life. There are three main kinds of patience: the patience of taking no account of those who inflict harm, the patience of willingly accepting adversity and the patience of gaining certainty with regard to the teachings. Their opposites are animosity, discouragement and reluctance to engage with the teachings.
From The Six Perfections: An Oral Teaching by Geshe Sonam Rinchen