Why does jem believe that both he and Atticus are gentlemen?

At the start of Chapter 10, Scout and Jem think about Atticus as "feeble." An older guy than the maximum in their schoolmates' parents,

Our father failed to do whatever.

The youngsters quickly located out differently. When Tim Johnson, the mad dog, got here ambling down the road, it became Atticus who Sheriff Tate referred to as upon to take the shot that killed the dog. Jem and Scout quickly found out that Atticus was recognized as "Ol' One Shot" while he became younger--the high-quality marksman withinside the county. They have been surprised that Atticus had by no means bragged approximately this expertise before, however, miss Maudie lectured them that

"... he is civilized in his heart. Marksmanship's a present of God, expertise... People of their proper minds by no means take delight of their talents..."

Jem understood this lesson in humility, and while Scout instructed him she could not wait to inform her buddies at school, he instructed her now no longer to "say anything about it." Although Scout became too younger to understand, Jem diagnosed that Atticus' humble and mild nature became the mark of a real gentleman. It became a trait of which Jem might be proud, and one which he desired to emulate himself. That's why he said

"Atticus is a gentleman, just like me."