Joseph-Louis Lagrange

The greatest discovery of all time is that a person can change his future by merely changing his attitude.

The soul is not in the body, but the body is in the soul.

The only true wisdom is in knowing you know nothing.

Do not go where the path may lead, go instead where there is no path and leave a trail.

The measure of intelligence is the ability to change.

As long as algebra and geometry have been separate, their progress have been slow and their uses limited; but when these two sciences have been united, they have lent each mutual forces, and have marched together to the conquest of the universe.

I have always been of the opinion that the true method of discovery is to have no method at all.

The great advantage of the analytical method is that it allows us to solve problems that would be impossible by other means.

It seems to me that the true method of discovery is to have no method at all.

Mathematics is the language in which God has written the universe.

The method of variations is a powerful tool for solving problems in mechanics and geometry.

The principles of mechanics are nothing but the consequences of a single principle, that of least action.

It is a singular fact that of all the sciences, mathematics is the one that has made the most progress in modern times.

The calculus of variations is a method for finding the maximum or minimum of a functional.

The theory of functions is the most important branch of mathematics.

The analytical method is the most powerful tool for solving problems in mathematics.

No figures are to be found in this work. The methods I set forth do not require either constructions or geometrical or mechanical reasonings, but solely algebraic operations, subject to a regular and uniform course.