p257 Enlightenment is the inner light of wisdom that is permanently free from all mistaken appearance, and whose function is to bestow mental peace upon each and every living being every day.

Enlightenment is the inner light of wisdom that is permanently free from all mistaken appearance, and whose function is to bestow mental peace upon each and every living being every day. Right now we have obtained a human rebirth and have the opportunity to attain enlightenment through Dharma practice, so if we waste this precious opportunity in meaningless activities there is no greater loss and no greater foolishness. This is because in future such a precious opportunity will be extremely hard to find.

Venerable Geshe Kelsang Gyatso Rinpoche,
How to Understand the Mind