“Occasionally one speaks… of signals or signal chains.”

“Inhumanity, n. One of the signal and characteristic qualities of humanity.”

“In the midst of normal activity, whatever it may be, there is a distant Signal, almost like heraldic trumpets. Everyone takes the Signal calmly, and with it, everyone stops speaking or whatever he may be doing. It is the Signal that He (or They) is coming through His Kingdom. There is no awestruck prostration or falling down on one's knees. Rather, the attitude is most matter-of-fact It is an occurrence to which all are accustomed and to comply takes absolute precedence over everything. There are no exceptions.”

“Can't stop the signal”

“The chairs and tables around us which broadcast to us incessantly those signals which affect our sight and touch cannot in their nature be like unto the signals or to the sensations which the signals awake at the end of their journey.”

“If I need you I'll give you a signal.'
'What signal?'
'I'll imitate the scream of a terrified little girl”

“Ships that pass in the night, and speak each other in passing,
Only a signal shown and a distant voice in the darkness;
So on the ocean of life we pass and speak one another,
Only a look and a voice, then darkness again and a silence.”

“Imprisoned in every fat man a thin one is wildly signalling to be let out.”

“What is learning but a set of sensory signals from the environment, with different forms of learning resulting from different types or patterns of sensory signals?”

“The unsolicited promise is one of the most reliable signals because it is nearly always of questionable motive.”