The great scientist Einstein said, "A = X+Y+Z, where A stands for success, X stands for hard work, Y stands for the correct method, and Z stands for less empty talk."

Edison, the great inventor, said, "Genius equals 1% inspiration and 99% blood and sweat."

Tolstoy, a great writer, said: "A person is like a fraction, his practical ability is equal to a numerator, and his evaluation of himself is like a denominator. The larger the denominator, the smaller the score. "