CONDITIONING, ACTION, LEARNING, BIOFEEDBACK
...actions readily become associated with other actions and with various states of mind...
Charles Darwin, Expression of The Emotions In Man And Animals

RELAXATION, THERMAL BIOFEEDBACK, BLOOD, HEART
"Head and feet keep warm, the rest will take no harm."
Fuller, Thomas, Gnomologia 6255

SELF AWARENESS, SELF CONTROL, BIOFEEDBACK, VOLITION, REGULATION
"We have writing and teaching, science and power; we have tamed the beasts and schooled the lightning... but we have still to tame ourselves."
Wells, H.G.

WRITING, COLD-HANDS, THERMAL BIOFEEDBACK
"It is a good sign to have one's feet grow cold when he is writing. A great writer and speaker once told me that he often wrote with his feet in hot water; but for this, all his blood would have run into his head, as the mercury sometimes withdraws into the ball of a thermometer."
Holmes, O.W.THE AUTOCRAT OF THE BREAKFAST TABLE

TEMPERATURE, BIOFEEDBACK, VASCULAR
"The veins unfill'd, our blood is cold, and then we put upon the morning,
are unapt to give or to forgive; but when we have stuffed these pipes
and these conveyances of our blood with wine and feeding, we have
suppler souls than in our priest-like fasts: Therefore, I'll watch him till he
be dieted to my request, and then I'll set upon him."
Shakespeare,  William, Coriolanus

THERMAL BIOFEEDBACK, EMOTION
"Why does my blood thus muster to my heart,
And dispossessing all my other parts
Of necessary fitness?"
Shakespeare