Being true or sincere to oneself is what is essential in our quest for the truth. Many or most people claim they possess or tell the truth. We know that can't always be the case since there are many contradictory statements. Each and everyone must be responsible in pursuing the truth, considering that the devil and his agents keep on spreading lies in the world so as to lead people astray by presenting evil under the guise of good, so as to deceive God's people. You know they want to bring as many as possible to hell (see the parable of the good seed and the bad seed in Mt.13:24-30).
Let us hear from the saints why it is so important to be sincere and persevering in our quest for the truth. , for example, a Jewish convert to Catholicism who became a Carmelite nun, has this to say: "He who seeks the truth, seeks God, whether he is aware of it or not." St. Augustine who talks about two cities on earth, the city of God and the earthly city, has this to say: "Anybody who is wholly dedicated to the pursuit of truth and moral virtue is implicitly a citizen of the city of God, anybody who abandons virtue for vice is ipso facto excluded from it." Jesus shows how important it is to learn and live the truth as He said: "If you make my word your house you will indeed be my disciples, you will learn the truth and the truth will make you free" (Jn. 8:32).
Think of those words and decide this very minute to seek the truth and be free to follow the truth. Even St. Teresa had commented that you just don't believe anybody but rather believe those who practice the good that they preach. That's why Jesus criticized the and experts of the law in His time because they lived only for external show (hypocrisy), but inwardly or privately did not practice what they asked others to do (see Mt. 23:1-39) As we mention here 2 cities, it would be good to remember the infallible words of Jesus and why it is so important for happiness and peace of heart to follow the way of obedience, humility and sacrifice. "Enter by the narrow gate, since the road that leads to perdition is wide and spacious, and many use it: but it is a narrow gate and hard road that leads to life, and only a few find it" (Mt. 7:13; Lk. 13:24).