Jamieson, Fausset & Brown

And also--"And even." The very slaves by becoming the Lord's servants are His freemen (Co1 7:22; Gal 3:28; Col 3:11; Plm 1:16). Therefore, in Act 2:18 it is quoted, "My servants" and "My handmaidens"; as it is only by becoming the Lord's servants they are spiritually free, and partake of the same spirit as the other members of the Church.