No summit out of sight

In my book No  Summit out of Sight I found a memory moment. The boy named Jay has been dreaming about climbing the 7 Summits.  His father has seen him very determined to do it and feels like he's ready. He looks back st a moment where people told him th he was to weak to be climbing suck a hard thing and he use to get very mad and sad because how small he was. He looked back st that and thought about how people used to underestimate him and now he is starting to get built little by little when everyone doubted him about never getting strong.