P.D. Ouspensky
Author: P.D. Ouspensky
Publisher: Vintage (1971)

Aim means direction, a certain line. If my aim is to go home from here, it will be right for me to turn to the right and wrong to turn to the left. This is how the principle of good and evil can be established. There can be no definition of good and evil, or right and wrong, without first establishing an aim or direction. When you have an aim, then what is opposed to your aim or takes you away from it is wrong, and what helps your aim is right. It must be your personal aim. If it corresponds to the possibilities of development, then the system explains these possibilities. And if you understand that what keeps us from reaching our aim is mechanicalness and what helps us is consciousness, it will follow that consciousness represents good and mechanicalness evil. So, instead of 'good' and 'evil' the system uses the words 'conscious' and 'mechanical'. This is quite sufficient for all practical purposes