Doubting everything and believing everything are two equally convenient solutions that guard — Henri Poincare
Doubt everything or believe everything: these are two equally convenient strategies. With — Henri Poincare
Mathematical discoveries, small or great are never born of spontaneous generation They — Henri Poincare
One does not ask whether a scientific theory is true, but only whether it is convenient. — Henri Poincare
What is it indeed that gives us the feeling of elegance in a solution, in a demonstration? — Henri Poincare
Thus, they are free to replace some objects by others so long as the relations remain unchanged. — Henri Poincare