A saint is a person who practices the keystone human virtue of humility. Humility in the face of wealth and plenty, humility in the face of hatred and violence, humility in the face of strength, humility in the face of your own genius or lack of it, humility in the face of another's humility, humility in the face of love and beauty, humility in the face of pain and death. Saints are driven to humbling themselves before all the splendor and horror of the world because they perceive there to be something divine in it pulsing and alive beneath the hard dead surface of material things -- greater and purer than they are.
Inner peace is not found by staying on the surface of life, or by attempting to escape from life through any means. Inner peace is found by facing life squarely, solving its problems, and delving as far beneath the surface as possible to discover its verities and realities.