Instinct and reason may lead us in the right direction. Its guidance almost always makes itself felt, and sometimes more surely than that of reason. It never goes astray. It would be infallible if it were not perverted by a false education, by pride, and by selfishness. Instinct does not reason.
Reason leaves freedom to choice, and gives man freewill.
Instinct is a rudimentary intelligence, differing from intelligence properly so called in this particular, viz., that its manifestations are almost always spontaneous, whereas those of intelligence are the result of combination and of deliberation. The manifestations of instinct vary according to the differences of species and of their needs. In beings that possess selfconsciousness and the perception of things external to themselves, it is allied to intelligence, that is to say, to freedom of will and of action.