“The greater part of human pain is unnecessary. It is self-created as long as the unobserved mind runs your life.
The pain that you create now is always some form of nonacceptance, some form of unconscious resistance to what is.
On some level of thought, your resistance is some form of judgment. On the emotional level, it is some form of negativity.
The intensity of the pain depends on the degree of resistance to the present moment, and this, in turn,
depends on how strongly you are identified with your mind.
The mind always seeks to deny the Now and to escape from it. In other words, the more you are identified with your mind, the more you suffer.
Or you may put it like this: the more you are able to honor and accept the Now, the more you are free of pain, of suffering — and free of the egoic mind.”
The Power Of Now – A Guide To Spiritual Enlightenment, Eckhart Tolle, p. 33.