“Arbitrium boni” is a Latin phrase that can be translated as “the judgment of the good” or “the decision of the good.” “Arbitrium” can be translated as “judgment” or “decision” and it refers to the act of making a choice or decision. “Boni” is the genitive form of “bonus,” which means “good”. In this context, it refers to what is considered morally good or virtuous.
Therefore, “arbitrium boni” suggests the act of making a decision based on what is morally good or virtuous. This phrase may be used in ethical or philosophical discussions to emphasize the importance of making choices that align with ethical principles or moral values.