Why do people feel the need to be preachy?

What does the Bible teach about preaching? Jesus Christ is Jehovah’s chief minister (di‧a′ko‧nos). He “became a minister of those who are circumcised in behalf of God’s truthfulness, so as to verify the promises He made to their forefathers,” also, “that the nations might glorify God for his mercy.” Therefore, “on him nations will rest their hope.”—Ro 15:8-12. Jesus’ appointment was from Jehovah himself. When he presented himself for baptism, “the heavens were opened up,” the account says, “and he [John the Baptizer] saw descending like a dove God’s spirit coming upon him [Jesus]. Look! Also, there was a voice from the heavens that said: ‘This is my Son, the beloved, whom I have approved.’” (Mt 3:16, 17) In his prehuman existence Jesus had served Jehovah for untold ages, but here he entered upon a new ministry. Jesus proved he was indeed God’s minister, serving both God and his fellowmen. Consequently, in the synagogue of his hometown of Nazareth, Jesus was able to take the scroll of Isaiah and read what is now chapter 61, verses 1, 2: “The spirit of the Sovereign Lord Jehovah is upon me, for the reason that Jehovah has anointed me to tell good news to the meek ones. He has sent me to bind up the brokenhearted, to proclaim liberty to those taken captive and the wide opening of the eyes even to the prisoners; to proclaim the year of goodwill on the part of Jehovah.” Then he went on to say to those assembled, “Today this scripture that you just heard is fulfilled.”—Lu 4:16-21. At the time Peter preached to the first Gentile convert, Cornelius, he described Jesus’ course during his three and one half years of earthly ministry, calling Cornelius’ attention to “Jesus who was from Nazareth, how God anointed him with holy spirit and power, and he went through the land doing good and healing all those oppressed by the Devil; because God was with him.” (Ac 10:38) Jesus literally walked throughout his assigned territory in the service of Jehovah and the people. Not only that, but he actually gave up his very soul as a ransom for others. He said: “The Son of man came, not to be ministered to, but to minister and to give his soul a ransom in exchange for many.”—Mt 20:28. Christian Ministers. In his ministerial work Jesus associated with himself many others, apostles and disciples, whom he trained to carry on the same ministerial work. He sent out at first the 12, then 70 others. God’s active force was also upon them, enabling them to perform many miracles. (Mt 10:1, 5-15, 27, 40; Lu 10:1-12, 16) But the major work they were to perform was to preach and teach the good news of the Kingdom of God. In fact, the miracles were primarily to give public evidence of their appointment and approval by Jehovah.—Heb 2:3, 4. Jesus trained his disciples, both by word and by example. He taught not only publicly but also in private homes, taking the good news directly to the people. (Mt 9:10, 28; Lu 7:36; 8:1; 19:1-6) From the accounts given by the writers of the Gospels, it is evident that Jesus’ disciples were present in many instances when he gave witness to various kinds of people, for the very conversations are recorded. According to the book of Acts, his disciples followed that example, making calls from house to house to declare the Kingdom message.—Ac 5:42; 20:20