Hereby know we that we dwell in him, and he in us, because he hath given us of his Spirit.
'Herein.' The token vouchsafed to us of God's dwelling (abiding) in us, though we see Him not, is that He hath given us "of His Spirit" (1 John 3:24). Where the Spirit is, there God is. ONE Spirit dwells in the Church: each believer receives a measure "of" that Spirit in the proportion God thinks fit (1 Corinthians 12:11). Love is His first-fruit (Galatians 5:22). In Jesus alone the Spirit dwells without measure (John 3:34).