Many people achieve nothing because they underestimate their abilities and undervalue themselves, thereby limiting their potential. Without self-confidence, individuals are prone to suspicion and defensiveness toward their environment. Heaven endowed me with talent, which is bound to be useful. — Li Bai. Middle age is an extension of youth, yet also a farewell to it. This departure is not merely a shift in concepts, but the confidence of a mature, independent person who can handle all sorts of problems at will. — Yu Qiuyu. The ignorant are more confident than the knowledgeable. Only the ignorant would confidently assert that science can never solve any problem. — Charles Darwin (UK). Self-confidence differs from arrogance; the confident are often calm, while the arrogant are often superficial. — Liang Qichao. Those who lack self-esteem bury themselves in inferiority. Remember, you are unique in this world. Lack of self-confidence is often the main cause of weak personality and professional failure. What allows me to float above the quagmire of life without sinking into its filth is my faith. — Dante. Be sure to have self-confidence. You are a landscape in yourself; there is no need to look up at others' landscapes. — Ke Xiaoye. Self-esteem is not looking down on others, self-confidence is not arrogance, and independence is not isolation. — Xu Teli. Inventors rely entirely on a remarkable sense of confidence to have the courage to move forward in an unknown world. — Balzac. Humor is a sign that a worker is confident in his work and indicates that he holds an advantage. — Marx & Engels. People tend to see themselves as too important, desperately hoping that they or their views will be recognized. Deep-seated insecurity, wrapped in strong utilitarianism, boils into a bowl of cloying spiritual poison. — Xu Song. Faith! Those with faith can withstand any storm. — Ovid. Value generates confidence, confidence generates enthusiasm, and enthusiasm conquers the world. — Walter H. Korte.