between real and imaginary things, distinguish between right and wrong, good and bad, just and unjust. In its fullness, it means the mental nature of man. It is one of the great possessions of man that distinguish him from the brute; it is the rational nature of the human animal as contrasted with the intelligence of the brute.
In the second place, thinking is the ability to dwell upon objects or thoughts, to examine them closely, to hold on to them firmly, to brood over them until they are thoroughly perceived and understood. It is this second aspect of thinking that should be considered carefully by all who would improve the memory, because until the faculty of hovering over a thought, or dwelling upon a subject, is mastered, it will be impossible to acquire a good memory.
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