For the kingdom of God is not in word, but in power.
Kingdom of God - i:e., living fellowship in the Gospel (Luke 17:21; Romans 14:17).
Is not in word. Translate, as in 1 Corinthians 4:19, "speech." Not empty 'speeches;' but the manifest "power" of the Spirit attests "the kingdom of God" (the reign of the Gospel spiritually) in a church or in an individual (cf. 1 Corinthians 2:1; 1 Corinthians 2:4; 1 Thessalonians 1:5).