The quote "Nice customs curtsy to great kings" from Shakespeare's "Henry V" highlights the theme of respect and deference that people show to those in power. It suggests that societal norms and traditions are often influenced by the authority of great leaders, indicating that respect is a fundamental aspect of leadership and governance. This reflects the idea that those who hold power are often revered and that their position commands a response from the populace.

In the context of the play, this line emphasizes the relationship between rulers and their subjects, showcasing how customs can elevate and validate the authority of a king. Shakespeare uses this sentiment to explore how power dynamics shape human interactions, and how the presence of leadership cultivates a culture of respect and hierarchy within society.