Henri Poincaré on thinking

Science is facts; just as houses are made of stones, so is science made of facts; but a pile of stones is not a house and a collection of facts is not necessarily science.

To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection.

Scientists believe there is a hierarchy of facts and that among them may be made a judicious choice. They are right, since otherwise there would be no science…

Great minds discuss ideas. Average minds discuss events. Small minds discuss people.

Eleanor Roosevelt1884–1962

• Ideas

It is the mark of an educated mind to be able to entertain a thought without accepting it.

Aristotle384–322 BC

• Education
• Ideas

He who learns but does not think, is lost! He who thinks but does not learn is in great danger.

Confucius551–479 BC

• Education