The quality of modesty, or humility, comes naturally when we’re attentive. When we see how reactive and unkind we can be, this humbles us considerably. Instead of causing despair, however, this painful realization can connect us with the tenderness of bodhichitta [or, awakened heart]. Modesty, or humbleness, is the opposite of armoring ourselves: it allows us to be receptive and hear what others have to say.
Conscientiousness denotes diligence and honesty. With this virtuous quality we can work calmly for the happiness of others. Instead of working frantically, we pace ourselves and relax.
From No Time to Lose: A Timely Guide to the Way of the Bodhisattva by Pema Chödrön, pages 134–135