Proselytizing is more a passionate search for something not yet found than a desire to bestow upon the world something we already have.  It is a search for a final and irrefutable demonstration that our absolute truth is indeed the one and only truth. The proselytizing fanatic strengthens his own faith by converting others.

Eric Hoffer (1902-1983) American writer, philosopher, longshoreman

The True Believer, ch. 88 (1951)