William Burkitt on Galatians 3:27

What the apostle had asserted in the foregoing verse, he proves in this; namely, that all believers are the children of God, through faith in Christ Jesus, because they are baptized into Christ and have put on Christ; that is, they are admitted into the Christian church by baptism, they profess Christ's holy religion; and if they live as they profess, they put on Christ; that is, they are made partakers of his Spirit, and do copy forth the excellencies of his life. To put on Christ, is not as to put on a suit of clothes fitted to the body, but as metal cast into a mould, receiving the figure from it.

Happy they who are not only sacramentally, but really and spiritually baptized into Christ: incorporated into them, and made one body with him by faith; who do not only bear his name, but wear his image.