I. Confirmation in the Economy of Salvation

From The Catechism of the Catholic Church

1290
In the
first centuries Confirmation generally comprised one single celebration with
Baptism, forming with it a “double sacrament,” according to the
expression of St. Cyprian. Among other reasons, the multiplication of infant
baptisms all through the year, the increase of rural parishes, and the growth
of dioceses often prevented the bishop from being present at all baptismal
celebrations. In the West the desire to reserve the completion of Baptism to
the bishop caused the temporal separation of the two sacraments. the East has
kept them united, so that Confirmation is conferred by the priest who baptizes.
But he can do so only with the “myron” consecrated by a
bishop.¹⁰⁰

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION TWO THE SEVEN SACRAMENTS OF THE CHURCH
- CHAPTER ONE THE SACRAMENTS OF CHRISTIAN INITIATION
  - Article 2 THE SACRAMENT OF CONFIRMATION
    - I. Confirmation in the Economy of Salvation

From The Catechism of the Catholic Church – rosary.team