Acts 18:25

Instructed. See on Luke 1:4.

Fervent [ζ ε ω ν]. Fervent, which is formed from the participle of the Latin ferveo, to boil or ferment, is an exact translation of this word, which means to seethe or bubble, and is therefore used figuratively of mental states and emotions. See on leaven, Matthew 13:33.

Diligently [α κ ρ ι β ω ς]. Rather, accurately; so far as his knowledge went. The limitation is given by the words following : knowing only the baptism of John. See on Luke 1:3; and compare the kindred verb, inquired diligently, Matthew 2:7, where Rev. renders learned carefully/y.