In short
The Law of God
The great principles of God's law are in the Ten Commandments and were lived out in the life of Christ. They express God's love, will and purposes for how people live and relate to Him and to each other. Obeying them is the fruit of salvation, not the way to earn it.
Read it in the Bible
Exodus 20:1-17; Psalm 40:7, 8; Matthew 22:36-40; John 15:7-10; 1 John 5:3
This is a short summary. The church's full statements are at adventist.org, and our pastors are glad to study any belief with you.