Famous quotes containing the words unknown and/or signal:
“Life is difficult for those who have the daring to first set out on an unknown road. The avant-garde always has a bad time of it.”
—Anton Pavlovich Chekhov (1860–1904)
“The experience of a sense of guilt for wrong-doing is necessary for the development of self-control. The guilt feelings will later serve as a warning signal which the child can produce himself when an impulse to repeat the naughty act comes over him. When the child can produce his on warning signals, independent of the actual presence of the adult, he is on the way to developing a conscience.”
—Selma H. Fraiberg (20th century)