Pope Melchiades on the Sacrament of Confirmation

Some non-catholics claim that Confirmation is an unnecessary sacrament because they see it as one in the same with Baptism.

However, from the earliest of Christian times, Christians understood verses such as Acts 8:14-17; Acts 19:5-6; Eph. 1:13; Eph. 4:30 as referring to a separate and important sacrament

"The Holy Ghost, Who comes down on the waters of Baptism bearing salvation in His flight, bestows at the font, the fullness of innocence; but in Confirmation He confers an increase of grace. In Baptism we are born again unto life; after Baptism we are strengthened" - Pope Melchiades (~311 A.D.) (From STh., III q.72 a.1 resp.)

image from the 'Public domain' (Picture of Holy Card)