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http://dx.doi.org/10.1037/12277-003
The Muscular Feelings agree with the sensations of the senses in being primary sources of feeling and of knowledge, localized in a peculiar set of organs; their characteristic difference is summed up in the consciousness of active energy. The most fundamental contrast existing among the feelings of the human minors the contrast of Active and Passive. The exercise of rowing a boat gives a feeling of activity or energy; in a warm bath, the consciousness is of the passive kind. The contrast would appear to be embodied in the nervous system; the outcarrying nerves, together with the nerve centres whence they immediately proceed, being associated with the feelings of activity; the incarrying nerves and their allied centres with sensation or passivity. (PsycINFO Database Record (c) 2016 APA, all rights reserved)