'Themselves' in the Bible

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].

Otherwise, what will those do who are being baptized for the dead? If the dead are not raised at all, why are people even baptized for them?

Brothers and sisters, you know that those of the household of Stephanas were the first converts in Achaia, and that they have devoted themselves for ministry to God’s people—now I urge you