To know how to suggest is the great art of teaching. Henri-Frédéric Amiel (1821-1881) Swiss philosopher, poet, critic Journal (16 Nov 1864) [tr. Ward (1887)]
We are susceptible only to those suggestions with which we are already secretly in accord. Carl Jung (1875-1961) Swiss psychologist Modern Man in Search of a Soul, ch. 3 [tr. Dell & Baynes (1933)]