Do what you will, only do something.
Exercise of the muscles keeps the body in health, and exercise of the brain brings peace of mind.
We profit little by books we do not enjoy.
Happy indeed is the naturalist: to him the seasons come round like old friends; to him the birds sing: as he walks along, the flowers stretch out from the hedges, or look up from the ground, and as each year fades away, he looks back on a fresh store of happy memories.
There are temptations which strong exercise best enables us to resist
In this world we do not see things as they are. We see them as we are, because what we see depends mainly on what we are looking for.