When you explain or hear the teachings, if your mind and the teachings remain separate, then whatever is explained will be inconsequential. Hence, listen in such a way that you determine how these teachings apply to your mind. For example, when you want to find out whether or not there is some smudge, dirt, or whatever, on your face, you look in a mirror and then remove whatever is there. Similarly, when you listen to the teachings, your faults such as misconduct and attachment appear in the mirror of the teachings. At that time, you regret that your mind has become like this, and you then work to clear away those faults and establish good qualities.
From The Great Treatise on the Stages of the Path to Enlightenment, Volume 1 by Tsong-kha-pa, pages 62–63