The Law of God is the Rule of Life to Saints
Source: TTT
1 Corinthians 9:21
To those without the law I became like one without the law (though I am not outside the law of God but am under the law of Christ), to win those without the law.
Galatians 5:13, 14
For you, brothers, were called to freedom; but do not use your freedom as an opportunity for the flesh. Rather, serve one another in love. / The entire law is fulfilled in a single decree: “Love your neighbor as yourself.”