Henry David Thoreau Exercise Quotations

What exercise is to the body, employment is to the mind and morals.

If you would get exercise, go in search of the springs of life.

He is not a true man of science who does not bring some sympathy to his studies, and expect to learn something by behavior as well as by application. It is childish to rest in the discovery of mere coincidences, or of partial and extraneous laws. The study of geometry is a petty and idle exercise of the mind, if it is applied to no larger system than the starry one. Mathematics should be mixed not only with physics but with ethics; that is mixed mathematics. The fact which interests us most is the life of the naturalist. The purest science is still biographical.

The study of geometry is a petty and idle exercise of the mind, if it is applied to no larger system than the starry one. Mathematics should be mixed not only with physics but with ethics; that is mixed mathematics.

I mean that they (students) should not play life, or study it merely, while the community supports them at this expensive game, but earnestly live it from beginning to end. How could youths better learn to live than by at once trying the experiment of living? Methinks this would exercise their minds as much as mathematics.

There is not one kind of food for all men. You must and you will feed those faculties which you exercise. The laborer whose body is weary does not require the same food with the scholar whose brain is weary.

The walking of which I speak has nothing in it akin to taking exercise, as it is called, as the sick take medicine at stated hours ... but is itself the enterprise and adventure of the day.

Friendship is never established as an understood relation. It is a miracle which requires constant proofs. It is an exercise of the purest imagination and of the rarest faith!....

To read well, that is, to read true books in a true spirit, is a noble exercise, and one that will tax the reader more than any exercise which the customs of the day esteem. It requires a training such as the athletes underwent, the steady intention almost of the whole life to this object. Books must be read as deliberately and reservedly as they were written.