Jung believes that there are 4 functions we use for our orientation in the world (and also to navigate our inner world): sensation, which is perception through the senses; thinking, providing meaning and understanding; feeling, measuring and valuing; and intuition, which speaks of future possibilities and informs us of the atmosphere surrounding every experience.

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Just as the lion attacks its prey with the front claw, not with the tail like the crocodile, our habitual reactions are characterized by the application of our most certain and efficient function; it is an expression of our strength. However, this does not prevent us from sometimes reacting in a way that demonstrates our specific weakness. The dominance of one function over another leads us to construct or seek certain situations and avoid others.

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