III. Hold fast to the statements of the Creed
This belief in the Lord's Incarnation, dearly-beloved, through which the whole Church is Christ's body, hold firm with heart unshaken and abstain from all the lies of heretics, and remember that your works of mercy will only then profit you, and your strict continence only then bear fruit, when your minds are unsoiled by any defilement from wrong opinions. Cast away the arguments of this world's wisdom, for God hates them, and none can arrive by them at the knowledge of the Truth, and keep fixed in your mind that which you say in the Creed.
Believe the Son of God to be co-eternal with the Father by Whom all things were made and without Whom nothing was made, born also according to the flesh at the end of the times. Believe Him to have been in the body crucified, dead, raised up, and lifted above the heights of heavenly powers, set on the Father's right hand, about to come in the same flesh in which He ascended, to judge the living and the dead. For this is what the Apostle proclaims to all the faithful, saying: “if you be risen with Christ seek the things which are above, where Christ is sitting on the right hand of God.
Set your mind on the things that are above, not on the things that are upon the earth. For you are dead, and your life is hid with Christ in God. For when Christ, our life, shall appear, then shall you also appear with Him in glory.”
Source: Sermons (New Advent)