Bede : For I see you are in the gall of bitterness and the bond of iniquity. Therefore, the Holy Spirit descended in a dove to teach those who would receive Him to be simple. For he who retains the gall of bitterness in his heart, however baptized he may seem to be, is not freed from the bonds of his iniquity, but as if purged for a single moment at the hour of baptism, he is soon oppressed seven times more fiercely by a demon. Therefore, in vain does he attempt to buy the grace of the Spirit, who has taken care to divest himself with a raven's mind. — Commentary on Acts