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For example, in some senses a "[[nature]]" is the ''source'' of a thing's action, and an "[[essence]]" is the ''source'' of a thing's being.

For example, in some senses a "[[nature]]" is the ''source'' of a thing's action, and an "[[essence]]" is the ''source'' of a thing's being.

A "[[cause]]" is a kind of principle, but the meaning of ''principle'' can be broader than "cause" in at least two ways.  First, a principle can be a "deprivation" in the sense of the absence of a thing understood to be present by nature.  For example the absence of a woman's eye, of which could be spoken as a principle of certain actions.

A "[[cause]]" is a kind of principle, but the meaning of ''principle'' can be broader than "cause" in at least two ways.  Firstly, a principle can be a "deprivation" in the sense of the absence of a thing understood to be present by nature.  For example the absence of a woman's eye, of which could be spoken as a principle of certain actions.

Secondly, in Christian theology, the [[Son of God]] and [[Holy Spirit]] were not created but are said to have God the Father as their "source" or principle.

Secondly, in Christian theology, the [[Son of God]] and [[Holy Spirit]] were not created but are said to have God the Father as their "source" or principle.