41 These are supernatural truths which form a solid basis and the strongest possible bond of a union, that is reinforced by the love of God and of our Divine Redeemer, from Whom all receive salvation "for the edifying of the Body of Christ: until we all meet into the unity of faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the age of the fullness of Christ" ( Ephesians iv. 12, 13).
Source: Summi Pontificatus (Vatican.va)