Practice. It's very important for developing any skill or endeavor. From music to art, sports or memorization, you won't get very far without it. However, practice doesn't come without dangers.
The daily repetition of practice develops the muscle memory and experience in the craft. It teaches the mechanics used as a foundation for a deeper and and more technical understanding.
The Lord's Supper. What does it mean to us today? Is it just a routine we have developed into tradition, or is it something we were commanded to do? Is it simply another part of our service, or does it mean anything to us today?