Humility must accompany all our actions, must be with us everywhere; for as soon as we glory in our good works they are of no further value to our advancement in virtue.
A Christian is: a mind through which Christ thinks, a heart through which Christ loves, a voice through which Christ speaks, and a hand through which Christ helps.
In matters that are so obscure and far beyond our vision, we find in Holy Scripture passages which can be interpreted in very different ways without prejudice to the faith we have received. In such cases, we should not rush in headlong and so firmly take our stand on one side that, if further progress in the search for truth justly undermines this position, we too fall with it.
So you see how endlessly futile and fruitless it would be if we wanted to refute their objections every time they obstinately resolved not to think through what they say but merely to speak, just so long as they contradict our arguments in any way they can.
And how shall I call upon my God, my God and Lord, since, when I call for Him, I shall be calling Him to myself? and what room is there within me, whither my God can come into me? whither can God come into me, God who made heaven and earth? is there, indeed, O Lord my God, aught in me that can contain thee?
Often a non-Christian knows something about the earth, the heavens, and the other parts of the world, about the motions and orbits of the stars and even their sizes and distances... and this knowledge he holds with certainty from reason and experience. It is thus offensive and disgraceful for an unbeliever to hear a Christian talk nonsense about such things, claiming that what he is saying is based in Scripture. We should do all that we can to avoid such an embarrassing situation, which people see as ignorance in the Christian and laugh to scorn.