The Lord says: “These people come near to me with their mouth and honor me with their lips, but their hearts are far from me. Their worship of me is based on merely human rules they have been taught” (Is. 29.13 NIV)
The Christian life is not about finding out God’s requirements during this age and doing it. Rather, it results from the transformation by the Spirit in finding delight in God. Christians are God’s children who resemble and reflect Him (though not always perfectly). The New Covenant was promised to establish a “knowing relationship of God.” The task of the Christian after regeneration is to know His word and be taught by Him. This results in delight and confidence where the Spirit’s fruits are manifested more consistently in the believer. The following article by Piper bolsters his contention that delighting in God is obedience.
The Joy of the Puritans — Desiring God