“Sanctify them by Your truth. Your Word is truth.” – John 17:17

The one point of failure to be most deeply regretted would be a failure in the holiness of our church members. If you yourselves act as others do, what witness do you bear? If your families are not graciously ordered; if your business is not conducted upon principles of the strictest integrity; if your speech is questionable as to purity or truthfulness; if your lives are open to serious rebuke-how can God accept you or send a blessing on the church to which you belong? It is all falsehood and deceit to talk about your being the people of God when even men of the world shame you. Your faith in the Lord Jesus must operate upon your lives to make you faithful and true, it must check you here, and excite you there; it must keep you back from this, and drive you on to that; it must constantly operate upon thought and speech and act, or else you know nothing of its saving power. How can I speak more distinctly and emphatically? Do not come to me with your experiences, and your convictions, and your professions, unless you sanctify the name of God in your lives. O brethren, we had better quit our professions if we do not live up to them. In the name of Him who breathed this prayer just before His face was encrimsoned with the bloody sweat, let us cry mightily unto the Father, “Sanctify us through Thy truth, Thy Word is truth.”

Nothing is truth to me but this one Book, this infallibly inspired writing of the Spirit of God. It is incumbent upon us to show the hallowed influence of this Book. The vows of God are on us, that by our godly lives we should show forth His praises who has brought us out of darkness into His marvellous light. This Bible is our treasure. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1890.cfm