Rene Descartes

Illusory joy is often worth more than genuine sorrow.

Illusory joy is often worth more than genuine sorrow.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

Dubito ergo cogito; cogito ergo sum.(I doubt, therefore I think; I think therefore I am)

Dubito ergo cogito; cogito ergo sum.(I doubt, therefore I think; I think therefore I am)

To know what people really think, pay regard to what they do, rather than what they say.

To know what people really think, pay regard to what they do, rather than what they say.

Each problem that I solved became a rule, which served afterwards to solve other problems.

Each problem that I solved became a rule, which served afterwards to solve other problems.