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
There may be men who act without understanding why. I do not. To listen much, pick out the good and follow it; to see much and ponder it: this comes next to understanding.
The spirit of [William] Penn will not be stayed. You cannot set limits to such knightly adventurers. After their own day is gone their spirits stalk the world, carrying inspiration everywhere that they go and reminding men of the lineage, the fine lineage, of those who have sought justice and right.