If your mind has been tamed, you can work on training your mind. It is like capturing a wild cow and domesticating it. In fact, the cow likes being domesticated; it becomes a part of your household. So first you tame your mind by means of mindfulness, or shamatha discipline. Then you train the mind by means of the contemplative practices of the mahayana, or the great vehicle of wakefulness, practices such as exchanging oneself for others as well as the actual field work of helping others.
From “Expanding Your Practice” in The Profound Treasury of the Ocean of Dharma. Volume Two: The Bodhisattva Path of Wisdom and Compassion by Chögyam Trungpa, page 57