Natural inward impulse; unconscious, involuntary, or unreasoning prompting to any mode of action, whether bodily, or mental, without a distinct apprehension of the end or object to be accomplished.

A natural aptitude or knack; a predilection; as, an instinct for order; to be modest by instinct.

An impulsion towards certain activities. Those psychic processes over which the ego has no control.

an involuntary prompting to action

Neuro-psychic impulse to the action or to the reaction.

a natural impulse or motivation arising from within.

Ability to maintain the ego and reach a state of success as a physical being relying on the pragmatic use of force; unlearned physical response. Compare Reason. Intellect Personal ability to persuade or be persuaded. Intellect is a tool of Reason. Compare Force.