The American Church Dictionary and Cycopedia
The inward and spiritual gift in Holy Baptism is regeneration, that is being born anew. It is well to note that Regeneration, or the "New Birth" is often confounded with "Conversion," or they are regarded as synonymous terms. This is a mistake and contrary to the teaching of Holy Scripture. Regeneration is a New Birth unto God whereby we become partakers of the nature of Christ. As the natural birth, so the new and spiritual Birth can take place only once, and that in Holy Baptism. A baptized Christian may repeatedly fall from Grace, and by repentance, by amendment of life and by forgiveness he may be again restored, (this is Conversion), but he cannot be said to be again regenerate without a grievous misapprehension of the language of the Bible and a total departure from the Doctrine of the Primitive Church. By Regeneration, therefore, is meant that gracious act of God whereby for Christ's sake. He brings us into a new relationship with Himself, adopts us as His own children, translates us into the kingdom of His Son, incorporates us into His Church, and so brings us under the influence of the Holy Spirit. Regeneration is the name originated for Baptism by our Lord Himself in His discourse with Nicodemus, as recorded in the third chapter of St. John's Gospel, and it is for this reason that this passage is appointed to be read in the service for the Baptism of Adults. (See BAPTISM, HOLY; also INFANT BAPTISM.)
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Miller, William James. Entry for 'Regeneration'. The American Church Dictionary and Cyclopedia. https://www.studylight.org/dictionaries/eng/acd/r/regeneration.html. 1901.