2.？ If you have good knowledge, you can get it in a proper way, but if you accumulate it in a proper way, you can get it in a proper way.
3.？ How big is the thought, how big is the energy.
4.？ Human energy = thought+the square of the speed of action.
1.？ The edge of the sword comes from sharpening, and the fragrance of plum blossoms comes from bitter cold.
2.？ An old horse crouches, aiming at a thousand miles. A martyr is full of courage in his later years.