Of Presumption

Of Presumption — St. Thomas Aquinas asks: Whether presumption is a sin?; Whether presumption is opposed to magnanimity by excess?.

We must now consider the vices opposed to magnanimity; and in the first place, those that are opposed thereto by excess. These are three, namely, presumption, ambition, and vainglory. Secondly, we shall consider pusillanimity which is opposed to it by way of deficiency. Under the first head there are two points of inquiry:

Article 1: Whether presumption is a sin?

It is written (Ecclus. 37:3): "O wicked presumption, whence camest thou?" and a gloss answers: "From a creature's evil will." Now all that comes of the root of an evil will is a sin. Therefore presumption is a sin.

Since whatever is according to nature, is ordered by the Divine Reason, which human reason ought to imitate, whatever is done in accordance with human reason in opposition to the order established in general throughout natural things is vicious and sinful. Now it is established throughout all natural things, that every action is commensurate with the power of the agent, nor does any natural agent strive to do what exceeds its ability. Hence it is vicious and sinful, as being contrary to the natural order, that any one should assume to do what is above his power: and this is what is meant by presumption, as its very name shows. Wherefore it is evident that presumption is a sin.

Article 2: Whether presumption is opposed to magnanimity by excess?

The Philosopher says (Ethic. ii, 7; iv, 3) that the "vain man," i.e. a vaporer or a wind-bag, which with us denotes a presumptuous man, "is opposed to the magnanimous man by excess."

As stated above (), magnanimity observes the means, not as regards the quantity of that to which it tends, but in proportion to our own ability: for it does not tend to anything greater than is becoming to us.

Now the presumptuous man, as regards that to which he tends, does not exceed the magnanimous, but sometimes falls far short of him: but he does exceed in proportion to his own ability, whereas the magnanimous man does not exceed his. It is in this way that presumption is opposed to magnanimity by excess.