The best of us are those who are best to our families

Think about how much easier it is to be kind to people outside the home. At work/school, in public, or around people we don't know very well, we are often much more considerate and aware of how we come across.

This is because there's often some kind of incentive: we want to seem put-together, be respected, avoid conflict, or we want something from someone. As if it's a currency of some sort, good manners can become a transactional good we are more willing to spend when it benefits us.

But at home, we are not trying to win anyone over. In absence of incentives for reputational gain or personal advantage, there's much less performance with parents/siblings/spouses, and thus home is where one's true character tends to show.

That's what makes it difficult to have good manners with those closest to us, but it is also what makes it much more meaningful.

At the end of the day, it doesn't matter what others think about us; what matters is sincerely desiring to have good manners with others.