They (the poets) are to us in a manner the fathers and authors of the wisdom.

No attempt should be made to cure the body without the soul

As the builders say, the larger stones do not lie well without the lesser.

Man is a biped without feathers.

How can you prove whether at this moment we are sleeping, and all our thoughts are a dream; or whether we are awake, and talking to one another in the waking state?

You cannot conceive the many without the one...The study of the unit is among those that lead the mind on and turn it to the vision of reality.

If it is naturally in you to be a good orator, a notable orator you will be when you have acquired knowledge and practice.