Another proof of the difference and distinction between sensation and feeling is the fact that the same sensation will produce different feelings in different persons experiencing the former, even at the same time. For instance, the same sight will cause one person to feel elated, and the other depressed; the same words will produce a feeling of joy in one, and a feeling of sorrow in another. The same sensation will produce different feelings in the same person at different times. An authority well says: "You drop your purse, and you see it lying on the ground as you stoop to pick it up, with no feeling either of pleasure or pain. But if you see it after you have lost it and have hunted for it a long time in vain, you have a pronounced feeling of pleasure." There is a vast range of degree and kind in feeling. Gordy says: "All forms of pleasure and pain are called feelings. Between the pleasure which comes from eating a peach and that which results from solving a difficult problem, or learning good news of a friend, or thinking of the progress of civilization--between the pain that results from a cut in the hand and that which results from the failure of a long-cherished plan or the death of a friend--there is a long distance. But the one group are all pleasures; the other all pains. And, whatever the source of the pleasure or pain, it is alike feeling." There are many different kinds of feelings. Some arise from sensations of physical comfort or discomfort; others from purely physiological conditions; others from the satisfaction of accustomed tastes, or the dissatisfaction arising from the stimulation of unaccustomed tastes; others from the presence or absence of comfort; others from the presence or absence of things or persons for whom we have an affection or liking. Over-indulgence often transforms the feeling of pleasure into that of pain; and, likewise, habit and practice may cause us to experience a pleasurable feeling from that which formerly inspired feeling of an opposite kind. Feelings also differ in degree; that is to say, some things cause us to experience pleasurable feelings of a greater intensity than do others, and some cause us to experience painful feelings of a greater intensity than do others. These degrees of intensity depend more or less upon the habit or experience of the individual. As a general rule, feelings may be classified into (1) those arising from physical sensations, and (2) those arising from ideas.