Quote from ACIM Text Chapter 1, Section 8 - Distortions of Miracle Impulses.

Your distorted perceptions produce a dense cover over miracle impulses, making it hard for them to reach your own awareness. The confusion of miracle impulses with physical impulses is a major perceptual distortion. Physical impulses are misdirected miracle impulses. All real pleasure comes from doing God's will. This is because not doing it is a denial of self. Denial of self results in illusions, while correction of the error brings release from it. Do not deceive yourself into believing that you can relate in peace to God or to your brothers with anything external.