question #1 Sahih al-Bukhari 165, Book 4, Hadith 31 : What is the significance of performing ablution thoroughly in Islam?

I heard Abu Huraira saying as he passed by us while the people were performing ablution from a
utensil containing water, “Perform ablution perfectly and thoroughly for Abul-Qasim (the Prophet)
said, ‘Save your heels from the Hell-fire.’ ”