Let me explain it this way. Silence doesn't mean nothing to say but nothing to say is silence. Where am I going with this? These are two different things all together and they share similarities.

Humility isn't Timidity and vice versa and yet they share some common traits. Same does arrogance and confidence.

Allow me to start with humility and timidity. Humility is good but when it goes overboard, it becomes timidity. Over confidence becomes arrogance. Too much of everything is bad basically.

People are entitled to their opinions and limits. What I may term over confidence, someone considers confidence.

Now to differences. While confidence comes from a place of belief, arrogance comes from a place of strength and pride. While humility comes from a place of peace and reverence, timidity comes from a place of fear.

They are easily mistaken for each other as they share similarities.