1Jn 4, 6 Anyone who knows God listens to us

(1Jn 4, 6) Anyone who knows God listens to us
[6] We belong to God, and anyone who knows God listens to us, while anyone who does not belong to God refuses to hear us. This is how we know the spirit of truth and the spirit of deceit.

(CCC 216) God's truth is his wisdom, which commands the whole created order and governs the world (Cf. Wis 13:1-9). God, who alone made heaven and earth, can alone impart true knowledge of every created thing in relation to himself (Cf. Ps 115:15; Wis 7:17-21). (CCC 215) "The sum of your word is truth; and every one of your righteous ordinances endures forever" (Ps 119:160) "and now, O LORD God, you are God, and your words are true" (2 Sam 7:28); this is why God's promises always come true (Cf. Dt 7:9). God is Truth itself, whose words cannot deceive. This is why one can abandon oneself in full trust to the truth and faithfulness of his word in all things. The beginning of sin and of man's fall was due to a lie of the tempter who induced doubt of God's word, kindness and faithfulness. (CCC 217) God is also truthful when he reveals himself - the teaching that comes from God is "true instruction" (Mal 2:6). When he sends his Son into the world it will be "to bear witness to the truth" (Jn 18:37): "We know that the Son of God has come and has given us understanding, to know him who is true" (1 Jn 5:20; cf. Jn 17:3). (CCC 1797) For the man who has committed evil, the verdict of his conscience remains a pledge of conversion and of hope. (CCC 1714) Man, having been wounded in his nature by original sin, is subject to error and inclined to evil in exercising his freedom.