To be conscious that we are perceiving or thinking is to be conscious of our own existence.

Men create gods after their own image, not only with regard to their form but with regard to their mode of life.

For through wondering human beings now and in the beginning have been led to philosophizing.

One cannot say of something that it is and that it is not in the same respect at the same time.

Perception starts with the eye.

The saying of Protagoras is like the views we have mentioned; he said that man is the measure of all things, meaning simply that that which seems to each man assuredly is. If this is so, it follows that the same thing both is and is not, and is bad and good, and that the contents of all other opposite statements are true, because often a particular thing appears beautiful to some and ugly to others, and that which appears to each man is the measure

The true forms of government, therefore, are those in which the one, or the few, or the many, govern with a view to the common interest; but governments which rule with a view to the private interest, whether of the one or of the few, or of the many, are perversions. For the members of a state, if they are truly citizens, ought to participate in its advantages.