Just as eating contrary to the inclination is injurious to the health, so study without desire sports the memory, and it retains nothing that it takes in.

Just as food eaten without appetite is a tedious nourishment, so does study without zeal damage the memory by not assimilating what it absorbs.

Anyone who conducts an argument by appealing to authority is not using his intelligence he is just using his memory

Anyone who in discussion relies upon authority uses, not his understanding, but rather his memory.

As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.

There are four Powers: memory and intellect, desire and covetousness. The two first are mental and the others sensual. The three senses: sight, hearing and smell cannot well be prevented; touch and taste not at all.