You shall love the Lord with all your heart.
People who had a good relationship with God knew that the only happiness was loving him with all their heart, and with all their soul, and with all their strength. Nothing was more important to them. It made them prosper and grow in wisdom and peace. This knowledge led them through their whole life. And their only endeavour was to listen to God very carefully and later to fulfill his precepts. They managed to do so because they knew and heard God's words. Moreover, they received his Spirit and placed all their trust in him who was their rock. Subsequently, God was always their stronghold and salvation. He was present in their lives all the time. He showed them his kindness and gave great victories. In short, they were participants in the kingdom of God.