 The sense of touch is not the only sensory power that is capable of reflexivity. Another such power is the so-called common sense—the highest cognitive power of the animal soul and the only internal sense Olivi acknowledges. Although he does not provide a systematic discussion of the reflexivity of the common sense, he suggests in several places that it is capable of apprehending its own activity by turning toward itself incompletely (semiplene) (Summa II q. 62, p. 595). This ability is related to the Aristotelian conception of perception of perception, but Olivi suggests something more than the traditional Aristotelian picture. Following Augustine, he argues that animals are aware of their own bodies and the purpose and value of their organs and body parts, since otherwise they would not be able to use their bodies effectively and preserve their lives: