The self-producing thinking is a thinking, which takes place in time, where the thinker places himself outside the Now and the facts, and compares them with earlier, and desires and wants something else.
This is the unreal life, the life where you only really exist in the hope of a richer future, in the dream of a lost past, or in compensatory and consoling acts: the problem-creating source itself.
If your life shall be real, the self-producing thinking must stop.
And the whole of the art of life is about bringing this thought-activity to an end.
This is very important to understand, because the thought is a product of time, of the experiences of yesterday.
The thought is caught in the net of time, and that which is of time, can never grasp the timeless, the life which happens fully and which is in the middle of itself.