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

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

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

Nothing strengthens authority so much as silence.

The noblest pleasure is the joy of understanding.

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.