“To shun selfishness and to have high regard for fairness and, being a human being, to wish to help and to be unwilling to harm one's fellow men is the noblest lesson.”
Musonius distills the whole moral curriculum into one sentence: fairness, helpfulness, and the refusal to harm.
There is more to this one. The full context — the events behind the words, what the author was living through, and how it applies to the specific situations of fatherhood — is in the app under Deeper Understanding.
Read the full context in DadViceDadVice matches wisdom like this to the real situations of fatherhood — the hard conversation, the long night, the moment you do not know what to say. Every quote is sourced. No motivational filler.