“When the Spirit of truth comes, he will guide you into all the truth” (John 16:13 ESV)
It is noteworthy that Jesus referred to Himself as the embodied character of absolute truth and honesty as noted in these verses: “I am the Way, the Truth and the Life”. He would often say in the gospel of John regarding the truthfulness of His words: “But because I tell the truth, you do not believe me.” (John 8:45 ESV); and “If I tell the truth, why do you not believe me?” (John 8:46 ESV); and “Nevertheless, I tell you the truth…” (John 16:7 ESV)
And if it wasn’t true he’d tell you: “if it were not so, I would have told you” (John 14:6; 14:2 ESV).
Before He ascended to the Father, He told His disciples that “When the Spirit of truth comes, he will guide you into all the truth” (John 16:13 ESV). All truth is not half-truths. Half-truths are lies. The apostle Paul wrote: “For all who are led by the Spirit of God are sons of God.” (Rom 8:14 ESV)
When you accept Jesus, you are then sharing the glory of His absolute Truth, his Holy Spirit’s Light on the subject, His Love towards your understanding, and His Moral Laws that you can know the wiles of the devil, and thus His Divine attributes as One in the trinity -divine unity with the Father, Son, and Holy Spirit.
You realize that to believe everything He says and lovingly represented as an incarnate man, you’ve now bound yourself to this convincing logical insight – and thereby have let the Spirit of Christ guide you to honesty within your own heart.