Geometry is not true, it is advantageous. Henri Poincare advantageousgeometrytrue Change image and share on social
Thus, they are free to replace some objects by others so long as the relations remain unchanged. Henri Poincare freelongobject Change image and share on social
How is an error possible in mathematics? Henri Poincare errormathematics Change image and share on social
Thought is only a flash between two long nights, but this flash is everything. Henri Poincare flashlongnight Change image and share on social
What is it indeed that gives us the feeling of elegance in a solution, in a demonstration? Henri Poincare demonstrationelegancefelt Change image and share on social
If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living. Henri Poincare beautifulknowlife Change image and share on social
To doubt everything, or, to believe everything, are two equally convenient solutions; both dispense with the necessity of reflection. Henri Poincare convenientdispensedoubt Change image and share on social
Hypotheses are what we lack the least. Henri Poincare hypothesislack Change image and share on social
The mind uses its faculty for creativity only when experience forces it to do so. Henri Poincare creativityexperiencefaculty Change image and share on social
