Wherever there is light, there is shadow; wherever there is length, there is shortness; wherever there is white, there is black. Just like these, as the self-nature of things can not exist alone, they are called non-substantial.
Do not close your eyes before suffering. Find ways to be with those who are suffering by all means, Including personal contact and visits, images, sound. By such means, awaken yourself and others to the reality of suffering in the world.
Do not believe anything on the mere authority of teachers or priests. Accept as true and as the guide to your life only that which accords with your own reason and experience, after thorough investigation. Accept only that which contributes to the well-being of yourself and others.
It is ignorance that smothers, and it is carelessness that makes it invisible. The hunger of craving pollutes the world, and the pain of suffering causes the greatest fear.