lse laws), than to defend an unjust cause,
since the former is a sin against the form, the latter against the
matter of justice. Yet it is seemingly lawful for an advocate to make
use of such underhand means, even as it is lawful for a soldier to
lay ambushes in a battle. Therefore it would seem that an advocate
does not sin by defending an unjust cause.

_On the contrary,_ It is said (2 Paralip. 19:2): "Thou helpest the
ungodly . . . and therefore thou didst deserve . . . the wrath of the
Lord." Now an advocate by defending an unjust cause, helps the
ungodly. Therefore he sins and deserves the wrath of the Lord.

_I answer that,_ It is unlawful to cooperate in an evil deed, by
counseling, helping, or in any way consenting, because to counsel or
assist an action is, in a way, to do it, and the Apostle says (Rom.
1:32) that "they . . . are worthy of death, not only they that do" a
sin, "but they also that consent to them that do" it. Hence it was
stated above (Q. 62, A. 7), that all such are bound to restitution.
Now it is evident that an advocate provides both assistance and
counsel to the party for whom he pleads. Wherefore, if knowingly he
defends an unjust cause, without doubt he sins grievously, and is
bound to restitution of the loss unjustly incurred by the other party
by reason of the assistance he has provided. If, however, he defends
an unjust cause unknowingly, thinking it just, he is to be excused
according to the measure in which ignorance is excusable.

Reply Obj. 1: The physician injures no man by undertaking to heal a
desperate malady, whereas the advocate who accepts service in an
unjust cause, unjustly injures the party against whom he pleads
unjustly. Hence the comparison fails. For though he may seem to
deserve praise for showing skill in his art, nevertheless he sins by
reason of injustice in his will, since he abuses his art for an evil
end.

Reply Obj. 2: If an advocate believes from the outset that the cause
is just, and discovers afterwards while the case is proceeding that
it is unjust, he ought not to throw up his brief in such a way as to
help the other side, or so as to reveal the secrets of his client to
the other party. But he can and must give up the case, or induce his
client to give way, or make some compromise without prejudice to the
opposing party.

Reply Obj. 3: As stated above (Q. 40, A. 3), it is lawful for a
soldier, or a general to lay ambushes in a just war, by prudently