 Bolzano specifies the content of the thus obtained formulation of the supreme moral law in several respects (RW I, 235). His explanations exhibit a remarkable awareness of problems. Thus, he points out that all sentient beings are equal and must be equally involved in the increase of happiness or decrease of suffering (RW I, 235). The addendum that this goes for beings “for whom there are no varying degrees of virtue” indicates that Bolzano would allow for certain distinctions in the case of beings which are capable of being virtuous (and for which there are consequently also differences of degree in regard to kinds of happiness which other beings cannot appreciate). The capacity of being virtuous is therefore — no less than sentience — a morally relevant quality for him. In this Bolzano agrees with considerations in contemporary ethics, according to which the quality of personhood is, in addition to sentience, morally relevant.