When you are present, you can allow the mind to be as it is without getting entangled in it. The mind in itself is a wonderful tool. Dysfunction sets in when you seek your self in it and mistake it for who you are.
Source: The Power of Now : A Guide to Spiritual Enlightenment, Pages: 40
The pain that you create now is always some form of nonacceptance, some form of unconscious resistance to what is. On the level of thought, the 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.
Source: The Power of Now : A Guide to Spiritual Enlightenment, Pages: 27