Source: Jesus Before Christianity: The Gospel of Liberation (1976), p. 42.
Context: There can be no doubt that Jesus was a remarkably cheerful person and that his joy, like his faith and hope, was infectious. This was in fact the most characteristic and most noticeable difference between Jesus and John. As we shall see later, Jesus feasted while John fasted (Luke 7:31-34).
“Yawns are not the only infectious things out there besides germs.
Giggles can spread from person to person.
So can blushing.
But maybe the most powerful infectious thing is the act of speaking the truth.”
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Vera Nazarian 38
American writer 1966Related quotes
Amira Roess (2020) cited in " The Wuhan coronavirus seems to have a low fatality rate, and most patients make full recoveries. Experts reveal why it's causing panic anyway. https://www.businessinsider.com/wuhan-coronavirus-unnecessary-panic-experts-say-2020-1?IR=T" on Business Insider, 31 January 2020.

Global Ideas from Pluto's Challenger (May 21, 2009)
Context: The best educators are the ones that inspire their students. That inspiration comes from a passion that teachers have for the subject they're teaching. Most commonly, that person spent their lives studying that subject, and they bring an infectious enthusiasm to the audience.I think many people have that enthusiasm, but they are prevented from being teachers because they didn't go through the teacher mill. Now you have teachers who have been through the teacher mill, yet they have no capacity to inspire anyone at all. It's the inspired student that continues to learn on their own. That's what separates the real achievers in the world from those who pedal along, finishing assignments.

Page 282 of An Anthropologist On Mars By Oliver Sacks

Vol. 1, p. 8; "A Letter Concerning Enthusiasm".
Characteristicks of Men, Manners, Opinions, Times (1711)

Source: Seth, Dreams & Projections of Consciousness, (1986), p. 94, quoting from Seth Session 15