Keeping Hashem in Mind at all Times

The Shlah Hakadosh writes the following about the kedushah of Pesach:

The holiness of this night with all the halachos and customs is extremely lofty. On this night, Hashem chose us from all other nations and sanctified us with His mitzvos. Therefore, it is appropriate for a person to be careful not to speak any mundane words on this night and one should teach his family members about this. Nothing should interrupt a person’s d’veikus with Hashem for a moment. Rather, one should only be immersed in the mitzvos of the night and relating the story of the miracles to his family.