Read 1 Timothy 6:12-16.

“That thou keep this commandment without spot, unrebukeable, until the appearing of our Lord Jesus Christ” (v. 14).

As the Apostle Paul is bringing this letter to Timothy to a close, he is emphasizing that Jesus Christ is coming again! In light of that fact, he is charging Timothy to be ready when Jesus Christ shall return. Readiness required adhering to the precepts that Jesus taught throughout His earthly ministry; making them his daily practice as the rule of life. His faithful commitment to the commandments of Jesus would enable Timothy to be a godly example to those around him.
A chorus we sang as children said, “Obedience is the very best way to show that we believe.” As the apostle charged Timothy to demonstrate that he believed Jesus was coming again by how he lived, the charge is ours as well. Obedience to Christ’s commandments is evidence that we, too, believe Jesus is coming again! Furthermore, an ongoing relationship is enriched when we daily practice doing God’s will God’s way! (Rodney Stearns)
“I and my house will serve the Lord: But first, obedient to His word
I must myself appear;
By actions, words, and tempers, show That I my heavenly Master know,
And serve with heart sincere.”
--- Charles Wesley

Obedience is a declaration that I believe God.