424.

It is the heart which perceives God, and not the reason. That is what faith is: God perceived by the heart, not by the reason.

12.

Order. Men despise religion. They hate it and are afraid it may be true. The cure for this is first to show that religion is not contrary to reason, but worthy of reverence and respect.
Next make it attractive, make good men wish it were true, and then show that it is.
Worthy of reverence because it really understands human nature.
Attractive because it promises true good.

7.

Letter showing the usefulness of proofs, by the Machine. Faith is different from proof. One is human and the other a gift of God. The just shall live by faith. This is the faith that God himself puts into our hearts, often using proof as the instrument. Faith cometh by hearing. But this faith is in our hearts, and makes us say not 'Scio' ['I know'] but 'Credo' ['I believe'].