The Dalai Lama

'Self-discipline, although difficult, and not always easy
while combating negative emotions, should be a defensive
measure. At least we will be able to prevent the advent of
negative conduct dominated by negative emotion.
That is 'shila', or moral ethics. Once we develop this
by familiarizing ourselves with it, along with mindfulness
and conscientiousness, eventually that pattern and way
of life will become a part of our own life.' ~ His Holiness
the Dalai Lama