Pema: Affection
Warm attachment fastened to one particular face. Grief and fondness arrive together, which is why the third asking wounds Peter instead of merely annoying him: he loves this man, so this man can cut him. Love someone and you have handed them the power to hurt you, and Peter is standing in that fact on the beach.
Vippaṭisāra: Remorse
The gnawing that trails a bad act. Three questions land on three denials made beside a charcoal fire, each one pressing the same bruise, and the grief is the bruise answering. Remorse has finished its job the moment it turns into the next right action; held past that, it only chews.
Cetopariya-ñāṇa: Direct knowledge of another's mind
Seeing straight into what is going on inside someone. Having promised loudly once and failed, Peter has nothing left to argue with, so he stops building a case and says, you know. Handing the verdict to someone who reads hearts is a relief when your own word has stopped being worth much.
Mettā: Loving-kindness
Goodwill wide enough to hold strangers. The questioning about affection ends in sheep, which swings love for one face outward onto a whole flock, most of whom Peter will never particularly like. Warmth for the teacher becomes warmth for whoever is hungry, and there it stops depending on how Peter feels that morning.
Dhammadāna: The gift of the teaching
Passing the teaching on as food. Sheep need pasture daily, so what Peter receives is long plain labor: lead them where there is something to eat, then do it again tomorrow. Three failures are answered by three assignments, and each assignment points away from his own heart toward somebody else's empty stomach.