Emptiness
Source: http://www.accesstoinsight.org/lib/authors/thanissaro/integrityofemptiness.html
Wisdom on all levels is wise because it works, and to work, it requires integrity: the willingness to look honestly at the results of your actions, to admit when you’ve caused harm, and to change your ways so that you won’t make the same mistake again.
Attachment and addiction are not metaphysical problems. They’re tactical ones. We’re attached to things and actions, not because of what we think they are, but because of what we think they can do for our happiness. If we keep overestimating the pleasure and underestimating the pain they bring, we stay attached to them regardless of what, in an ultimate sense, we understand them to be.
If he started hiding his mistakes from them, he would soon start hiding them from himself.