Who tried 2,000 different materials in the process of lighting the bulb. After 2,000 failures, his assistant "All our efforts were in vain! We learned nothing." he replied very “We have learned a lot and improved a lot. We now know that there are 2,000 types of materials that are not suitable for use in light bulbs.” “Praise is not encouragement, criticism is not unpleasant — a way of production where they need to know the quality of their products and their strengths.” Relaxing article. Spending a few minutes sitting quietly, relaxing our body and mind, we can quantify the degree of destruction of the thought forms being created in our mind.