Jealousy is a disease, love is a healthy condition. The immature mind often mistakes one for the other, or assumes that the greater the love, the greater the jealousy.
Don’t ever become a pessimist… a pessimist is correct oftener than an optimist, but an optimist has more fun, and neither can stop the march of events.
One could write a history of science in reverse by assembling the solemn pronouncements of highest authority about what could not be done and could never happen.
