As human beings here on earth the most important thing we can do is to hear God's word frequently. We need to listen often, carefully, intently, and seriously because it comes from God and is meant for our blessing.
So much depends upon God's Word. Without it, no holy day can be sanctified. Therefore, we must know that God insists upon a strict observance of this command and will punish all who despise His Word and are not willing to hear and learn it, especially at the time appointed for the purpose.
It is not only the people who misuse and desecrate the holy day who sin against this commandment (those who neglect to hear God's Word because of greed or frivolity or lie in taverns and are dead drunk like swine). Even that other crowd sins [when] they listen to God's Word like it was any other trifle and only come to preaching because of custom. At the end of the year they know as little of God's Word as at the beginning. Up to now the opinion prevailed that you had properly hallowed Sunday when you had heard a Mass or the Gospel read. But no one cared for God's Word, and no one taught it. Now that we have God's Word, we fail to correct the abuse. We allow ourselves to be preached to and admonished, but we do not listen seriously.
Know, therefore, that you must be concerned not only about hearing, but also about learning and retaining God's Word in memory. Do not think that this is optional for you or of no great importance. Think that it is God's commandment, who will require an account from you about how you have heard, learned, and honored His Word. (paragraphs 95-98)
Condensed from CONCORDIA: THE LUTHERAN CONFESSIONS, copyright 2005,2006 by Concordia Publishing House. Used by permission. All rights reserved. To purchase a copy of CONCORDIA, call 800-325-3040.