Necessity is the mother of invention, we say. When a thing is utterly necessary we do not tend to bargain or try to have a choice. Necessity is urgent, it is the spur of genius, and is blind until it becomes conscious. Necessity gives great strength to the person who needs it and Sallust says, ‘necessity makes even the timid brave’. When we analyze what drives us to achieve something, we conclude that it is the necessity and not the pleasure that acted as the driving force. For instance, when a tiger chases a deer, it is said that deer tries to run faster than the tiger because it needs to save its life. Similarly, even a brave man is forced to become knave due to necessity, which we see from practical experience. Here are quotes on necessity given by many philosophers. Read them and enjoy.