“To know what you know and what you do not know, that is true knowledge.”
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To see what is right and not to do it is want of courage, or of principle.
I wish I had known more firsthand about the concerns and problems of American businesspeople while I was a U.S. senator and later a presidential nominee. That knowledge would have made me a better legislator and a more worthy aspirant to the White House.
If we look at the realm of knowledge, how exceedingly small and limited is that part acquired through our own senses how wide is that we gain from other sources.
There is no greater impediment to the advancement of knowledge than the ambiguity of words.