Of the Effects of Faith

Of the Effects of Faith — St. Thomas Aquinas asks: Whether fear is an effect of faith?; Whether faith has the effect of purifying the heart?.

We must now consider the effects of faith: under which head there are two points of inquiry:

Article 1: Whether fear is an effect of faith?

It is written (James 2:19): "The devils . . . believe and tremble."

Fear is a movement of the appetitive power, as stated above (). Now the principle of all appetitive movements is the good or evil apprehended: and consequently the principle of fear and of every appetitive movement must be an apprehension. Again, through faith there arises in us an apprehension of certain penal evils, which are inflicted in accordance with the Divine judgment. In this way, then, faith is a cause of the fear whereby one dreads to be punished by God; and this is servile fear.

It is also the cause of filial fear, whereby one dreads to be separated from God, or whereby one shrinks from equalling oneself to Him, and holds Him in reverence, inasmuch as faith makes us appreciate God as an unfathomable and supreme good, separation from which is the greatest evil, and to which it is wicked to wish to be equalled. Of the first fear, viz. servile fear, lifeless faith is the cause, while living faith is the cause of the second, viz. filial fear, because it makes man adhere to God and to be subject to Him by charity.

Article 2: Whether faith has the effect of purifying the heart?

Peter said (Acts 15:9): "Purifying their hearts by faith."

A thing is impure through being mixed with baser things: for silver is not called impure, when mixed with gold, which betters it, but when mixed with lead or tin. Now it is evident that the rational creature is more excellent than all transient and corporeal creatures; so that it becomes impure through subjecting itself to transient things by loving them. From this impurity the rational creature is purified by means of a contrary movement, namely, by tending to that which is above it, viz. God. The first beginning of this movement is faith: since "he that cometh to God must believe that He is," according to Heb. 11:6. Hence the first beginning of the heart's purifying is faith; and if this be perfected through being quickened by charity, the heart will be perfectly purified thereby.