Follow good examples set by elders; Respect what they do; Be humble before Allah's power

This hadith is about how 'Umar bin Khattab respected and followed the example of Prophet Muhammad (ﷺ). He saw that the Prophet had kissed the Black Stone, so he did too even though he knew it was just a stone and could not bring any benefit or harm. This shows us that we should respect what our elders do, even if we don't understand why they are doing it. We should also follow their example in good deeds as much as possible. It also teaches us to be humble and to remember that Allah is all powerful and can bring both benefit and harm without needing help from anything else.