"True and genuine inward certainty does not in the least fear outward analysis, nor does truth resent honest criticism. You should never forget that intolerance is the mask covering up the entertainment of SECRET DOUBTS as to the trueness of one's belief. No man is at any time disturbed by his neighbor's attitude when he has perfect confidence of thoroughgoing honesty about those things which one professes to believe. Sincere men are unafraid of the critical examination of their true convictions and noble ideas."
Not my words.
I put it in quotes to suggest it was a quote but I did not add the attribution because I assumed it would muddle the message.
Nevertheless, the framing of where INTOLERANCE comes from and what it is hiding IS THE MESSAGE.
Who do we know who is constantly intolerant?
Nomes de guerre