When the Israelites were at Mt. Sinai, they were afraid of the glory of God, and the fire that they felt would consume them. They asked Moses to speak to God for them, that they may live. God mused that He hoped that–desired that–the people would always fear Him and obey His commandments. Then God informed Moses that He would give him all the commandments and instructions on behalf of the people. Here, Moses reminds the Israelites of the need to not deviate from the commands of God, and to walk in them in the Promised Land.
Then we move into one of the most-quoted passages of the Old Testament, the Shema:
Deuteronomy 6:4–5 (NKJV)
4 “Hear, O Israel: The Lord our God, the Lord is one! 5 You shall love the Lord your God with all your heart, with all your soul, and with all your strength.
The passage then gives instructions on how integral the commandments of God must be in the life of the nation. They must be taught to their children at all times of the day, and even be posted on the doors of their homes. They were to wear the commandments between their eyes, and go to bed and rise with the commandments.
If there is anything to glean from these passages, it is that the people of God must live in a reverent awe of God, and that they must know and obey the commandments of God. While this may seem like a simplistic summary of the nature of discipleship, it is quite certain that simplicity is what serving God is all about. While He is not simple, serving Him is simply a matter of humble obedience to the God of all creation. Live for Him!