The complete analysis of the mechanisms by which such behavior is accomplished would be both too difficult and too exhaustive to be undertaken here. We may, however, point out some few of the salient factors involved. It has been shown that, so far as Class A is concerned, to do _right_ is to proceed directly and immediately, and along a straight line, if possible, to the desired object. Such behavior requires both strength and skill; from which it also follows that a feeble, untrained body will be unable to do “right” in a great many cases, simply because it cannot reach its goal in the face of obstacles. This is our common observation. Before a baby learns to walk, it cannot proceed directly or immediately across a floor. Neither can an exhausted man, unable to use the sun for a compass, find his way to safety out of a tropical forest. For a person in his predicament, things are not likely to come out “right.” Furthermore, in a great many cases of the same sort, skill and strength are _both_ required; neither one alone is sufficient to attain the desired end. Let now the psychologist tell the story of how the attainment of skill depends upon a standard equipment of sense organs, a sound and complete brain, and muscles from which sensory stimuli elicit precise responses. Let also the physiologist relate here how bodily vigor likewise depends upon the interrelation of internal functions: how the heart, lungs, brain, muscles, thyroid, liver, and adrenals all work together to make any effort successful and complete. When this has been said, the meaning of the word “right” as defined in Class A will have been more fully revealed.