Just as the current of electricity is the electricity itself, the oneness of the Spirit is the Spirit Himself. At the time we believed in the Lord Jesus, this wonderful, inexhaustible Spirit came into us as the oneness. We know this in a practical way because we have loved the brothers and have wanted to contact them since the day we believed in the Lord Jesus and He came into us.
The genuine oneness is the very Spirit who is within us. Every real Christian has this oneness, which is nothing less than the living Lord Himself as the wonderful, all-inclusive life-giving Spirit who is within us (2 Corinthians 3:17; 1 Corinthians 15:45b). Now what we need today is not to receive or gain this oneness but to endeavor, strive, and struggle to keep, maintain, and preserve the oneness. (The Vision, Practice, and Building Up of the Church as the Body of Christ, ch. 13, by Witness Lee)