What counts as a "beautiful" or "ugly" act in your terms? To use terms such as "beautiful" and "ugly" when trying to determine good and bad deeds seems inappropriate when trying to establish a set of ethical principles. We might as well say that "morality is in the eye of the beholder". Beauty is a subjective experience, beauty is not established as being in the world, you cannot prove something to be "beautiful", or indeed "ugly".
Couldn't we not somehow use our ability to understand others as a basis for ethical principles? The fact that we have the capacity to understand another's situation, and appreciate them as another human being, who is much like us, give us the ability to forgive them; so rather than responding to anger with anger for example, we can use our capacity to understand a persons anger, and rather than respond with anger an potentially worsen the situation, we can respond more calmly, and be of a sound mind to rectify the situation, because we understand the position that they are coming from.