Self-observation is one of the core tools in the Fourth Way practice.

With self observation, of course, you will come to see that you are literally a stimulus-response machine. But more than that, it is a tool for self-purification.

With sincere practice of self-observation, you will learn to discern the vibrations of lower thoughts, beliefs, and attitudes in yourself, and start to see motivations and reasons behind them clearly.
You purify yourself by simply giving these lower vibrations up, by letting them go. So that you may become lighter, more transparent, and be able to hold higher vibrations – the light.

In time the self-observation will become your second nature. You will be able to sense a lower vibration in yourself immediately when it arises, and simply drop them.

The Fourth Way is a way of purification.
Your lower self will insist it is not safe to become pure, it is not safe to let it go. Have courage and keep dropping impurity from yourself. Purity is who you are.

You will find that It is much easier to live in higher vibrations, in a higher world, surrounded by the light.