Commentaries:
Robertson's Word Pictures (NT)
But (alla). So usually, though it is open to question whether alla is adversative here and not rather, "Now then."
Get thee down (katabhqi). Second aorist active imperative, at once.
Go (poreuou). Present middle imperative, go on.
Nothing doubting (mhden diakrinomenov). Another compound of dia, old and common verb for a divided mind (dia like duo, two). Note usual negative of the present middle participle, the subjective mhden. The notion of wavering (James 1:6) is common with this verb in the middle voice. In Acts 11:12 the aorist active (mhden diakrinanta) is used perhaps with the idea of conduct towards others rather than his own internal doubt as here (Page).
For I (oti egw). The Holy Spirit assumes responsibility for the messengers from Cornelius and thus connects their mission with the vision which was still troubling Peter. Peter had heard his name called by the man (verse Acts 10:19).
Other Robertson's Word Pictures (NT) entries containing Acts 10:20:
Acts 10:29
Acts 11:12
James 1:6
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