"At the cost of one failure, the wise learn the lesson for the whole of life." Hazrat Inayat Khan
Commentary by Pir-o-Murshid Inayat Khan:
It happens very often that we find that a person who has been successful in life goes on being successful, and that one who has once failed goes on failing. Looked at from a psychological point of view, the reason is that the first person was impressed by his success and so he continued to be successful, and the other, who was impressed with his failure, continued to have failures because that impression suggested failure to him. But it is not because of the displeasure of God that unfortunate souls continue to be unfortunate in everything they do. It is that the suggestion of misfortune, of misery, keeps them miserable throughout their lives.
Reasoning is a faculty which the mystic uses and which he may develop like any man of common sense, any practical man. The difference is only that the mystic does not stop at the first reason, but wishes to see the reason behind all reasons. Thus, in everything, whether right or wrong, the mystic seeks for the reason. The immediate answer, however, will be a reason that does not satisfy him, for he sees that behind that reason there is yet another reason. ... The nature of life is such that it easily excites the mind and makes man unhappy in an instant. It makes man so confused that he does not know where to take the next step. In contrast with this, the mystic stands still and inquires of life its secret; and from every experience, from every failure or success, the mystic learns a lesson. Thus, both failure and success are profitable to him.
The ideal of a mystic is never to think of disagreeable things. What one does not want to happen one should not think about. A mystic erases from his mind all the disagreeable things of the past. He collects and keeps his happy experiences, and out of them, he makes a paradise. Are there not many unhappy people who keep part of the past before them, causing them pain in their heart? Past is past; it is gone. There is eternity before us.