How does Kant understand the concept of a good will? Is it possible, for instance, that someone of naturally sympathetic temperament might also have a good will, in Kant’s sense?
Short answer: yes. Kant would say that a person's will is good if he would do the right thing because it is
right regardless of whether he wanted to. The important thing for Kant is that one do the right thing simply because it is the right thing.
I don't know if that's correct. I thought that "wanting to" (volition) does play a role in Kant's definition of a good will. He says that
"a good will is not good because of what it effects or accomplishes, because of its fitness to attain some proposed end, but only because of its volition, that is, it is good in itself and, regarded for itself, is to be valued incomparably higher than all that could merely be brought about by it in a favor of some inclination and indeed, if you will, of the sum of all inclinations." 4:394
It seems like merely
doing the right thing is not enough, but that one must
will the right thing.
Kant himself explores the question of what it is for a will to be good in the first section of the
Groundwork (pp. 397-9). He approaches the question through a consideration of various ways in
which one might be led to perform an action which is in accord with duty. The main possibilities
considered are (i) the case in which one is led to do the dutiful action out of an indirect inclination
(the shopkeeper, p. 397); (ii) the case in which one is led to do the dutiful action out of a direct or
immediate inclination (the sympathetically constituted agent, p. 398); and (iii) the case in which one
does the dutiful action out of duty, without any direct or indirect inclination or desire to perform the
action, and perhaps even in the face of competing inclinations or desires (the friend of mankind who
has lost her sympathetic feelings, p. 398).
Kant’s conclusion is that actions have moral value only when they resemble case (iii), in which we
know that the action is done from the
motive of duty rather than out of (direct or indirect)
inclination.
By saying that
Kant would say that a person's will is good if he would do the right thing because it is right regardless of whether he wanted to. The important thing for Kant is that one do the right thing simply because it is the right thing.
is to say that the action, and not the will (volition), determines the good will. This seems contrary to what Kant is saying.