The importance of hearing the Word of God:
James 1:22-25 NKJV
22 But be doers of the word, and not hearers only, deceiving yourselves. 23 For if anyone is a hearer of the word and not a doer, he is like a man observing his natural face in a mirror; 24 for he observes himself, goes away, and immediately forgets what kind of man he was. 25 But he who looks into the perfect law of liberty and continues in it, and is not a forgetful hearer but a doer of the work, this one will be blessed in what he does.
Col 1:28 NKJV
28 Him we preach, warning every man and teaching every man in all wisdom, that we may present every man perfect in Christ Jesus.
Romans 10:14 NKJV
14 How then shall they call on Him in whom they have not believed? And how shall they believe in Him of whom they have not heard? And how shall they hear without a preacher?
2 Tim 4:2 NKJV
2 Preach the word! Be ready in season and out of season. Convince, rebuke, exhort, with all longsuffering and teaching.
Matt 10:27, Mark 16:15, Luke 9:2, Rom 10:8, Luke 7:22,