"In order to improve the mind, we ought less learn than to contemplate."
"I cannot escape the objection that there is no state of mind, however simple, that does not change every moment."
"All paid jobs absorb and degrade the mind."
"Whenever the speech is corrupted so is the mind."
Seneca the Younger
"I am indeed amazed when I consider how weak my mind is and how prone to error."
"It is not enough to have a good mind; the main thing is to use it well."
"The energy of the mind is the essence of life."
"Among the facts of the universe to be accounted for, it may be said, is Mind; and it is self evident that nothing can have produced Mind but Mind."
John Stewart Mill
"The mind is furnished with ideas by experience alone."
"the importance of knowledge consists not only in its direct practical utility but also in the fact that it promotes a widely contemplative habit of mind."
"Educating the mind without educating the heart is no education at all."
"A mind is a fire to be kindled, not a vessel to be filled."