'Good will' in the Bible

The husband must fulfill his [marital] duty to his wife [with good will and kindness], and likewise the wife to her husband.

Now about food sacrificed to idols, we know that we all have knowledge [concerning this]. Knowledge [alone] makes [people self-righteously] arrogant, but love [that unselfishly seeks the best for others] builds up and encourages others to grow [in wisdom].

If I do it with a good will, I have a reward. But if I do it against my will, an office is committed unto me.

Indeed, brothers, if I come to you speaking in foreign languages, what good will I be to you unless I speak to you in some revelation, knowledge, prophecy, or teaching?

Again, what good will they be doing who are baptized on behalf of the dead? If it is true that the dead do not rise, why are people baptized on their behalf?