The most fruitful and natural exercise for our minds is, in my opinion, conversation.
I can't travel without Sudoku.
Exercise of body and exercise of mind are supplementary, and both may be made recreative and educative.
The test and the use of man's education is that he finds pleasure in the exercise of his mind.
Spirituality as a science, as a study, is the greatest and healthiest exercise that the human mind can have.
I play chess with the computer when I feel dull in my mind and after two games - 'out or win', I feel sharp again.
The nice thing about doing a crossword puzzle is, you know there is a solution.
If you exercise your mind, you're not going to get sick.
Books are health food for your brain and dessert for your soul. Books are one of the few proven sources of mental exercise known to man. Reading is a workout for your mind. If your body needs thirty minutes of exercise a day, so does your thinker.
