The Incarnation is the assumption of a human nature by the Second Person of the Holy Trinity: the Son of God became man in the divine Person Jesus Christ.
Intellect
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Intellect is a person’s ability to know and understand. All human beings have an intellect.
Nature
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The nature of something is what it is.
Person
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A person is a unique individual who has knowledge of him or herself, free will, and a capacity for love.
Will
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Will is the power (or ability) of the human soul to choose freely and to act.