Mathematics is no taint of error and most certain in itself.
Antonio Ambrosetti (1944-)
Even in mathematics it takes place a gradual development of knowledge that takes research to make strides. But there is always some results that escapes us and that will be proven in the future probably.
John Arbuthnot (1667-1735)
Mathematical knowledge adds vigor to the mind, and freedom from prejudice, superstition and credulity.
Eric Temple Bell (1883-1960)
Of course’ it is the most dangerous word in mathematics.