"Or take fire: its nature is much humbler than the things we have been discussing. Yen on one believes fire to be polluted through having foul or repulsive matter thrust on to it. If there is general agreement about this in the case of material things, do you really imagine that any pollution or defilement can result in the case of the supreme, incorporeal nature which transcends fire and light?" p. 46
"Thus, with the soul acting as medium and containing the Word of God in the secret citadel of rational spirit, God was born from the Virgin without any of that loss of majesty" p. 47
On belief, which is the reason of the creed: At some point, we will be pressed to believe things that are illogical. For some, the existence of aliens seem a plausible thing to place logical belief in. Rufinus uses the example of Greek mythology, a God being born from another God's body (those born from Jupiter), or a God being born from sea foam (Venus).
Apologetics and Belief: It has been my experience that many will profess faith in Christ, though with heavy contingency. Many believe in Christ, though not as a miracle worker, not as one raised from the dead, not as one who commissioned a church, etc... It's a great exercise a) ask yourself, and others if and what they believe about Christ. It may be that one only believes a man by the name of Jesus once lived. Then b) to press what I/they actually believe about Christ, and what are the contingencies.
"Only He who Himself knows no stain of sin could abolish the sins of all men, at any rate of those who had marked the doorposts of their faith with His blood." p. 51