My own mind is my own church.
All historians, even the most scientific, have bias, if in no other sense than the determination not to have any.
Generally speaking, men are influenced by books which clarify their own thought, which express their own notions well, or which suggest to them ideas which their minds are already predisposed to accept.
No one can deny that much of our modern advertising is essentially dishonest; and it can be maintained that to lie freely and all the time for private profit is not to abuse the right of free speech, whether it is a violation of the law or not. But again the practical question is, how much lying for private profit is to be permitted by law?