No man on earth can explain fully the Trinity. The finite mind cannot fully comprehend an infinite being. Even did God condescend to explain the doctrine fully to you, you would lack the capacity necessary in order to comprehend it. It is a revealed mystery to be accepted as true merely because God teaches it. However, we can explain the doctrine which Christians must believe. There are three divine Personalities in one divine Nature—the Father, the Son, and the Holy Ghost. These three Persons are equal in all things; equally God, equally eternal, powerful, etc. God is an infinitely perfect and purely spiritual Being, active in His knowledge and love. The knowledge God has of Himself is a living Personality called the Son. The idea of intellectual generation is not foreign to us, for we ourselves speak of our own thoughts as concepts and as the offspring of our intelligence. The mutual and reciprocal love between Father and Son is also a living personality—the Holy Spirit. There is no contradiction in this doctrine. We do not speak of one divine nature, yet three divine natures; nor of three divine persons, yet one divine person. We speak of one Divine Nature, yet of three Divine Persons, nature, and personality being quite different aspects of our consideration. It is as if, when dealing with the Persons, we viewed numerical distinction, as in the addition of 1 + 1 + 1 into 3, yet when dealing with the Nature in which all three Persona share, that fusion which results in unity by multiplication of the same three figures— 1X1X1 equals 1. Yet whilst the absence of contradiction is clear, the full significance of the triune nature of God is beyond the limited capacity of the human mind. We know the fact by revelation, and believe it implicitly because God has revealed it.
Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty
The Case for Catholicism - Answers to Classic and Contemporary Protestant Objections
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