The word "preach" originally meant to “announce” the message of the kingdom of God? John the Baptist preached that the kingdom was near (Matthew 3:1-2). Jesus preached that same message (Matthew 4:17). Jesus instructed his disciples to preach it as well. Today, we associate preaching with what is taught at church, not what is announced to unbelievers. Both preaching and teaching are VERY important to the life of the church. Preaching was originally a public announcement to unbelievers including a message of repentance and turning to God (Matthew 3:2; 4:17). Teaching was supposed to be what happened inside of church time, instructing believers to obey what Jesus had commanded. The most important thing that we need to learn is what Jesus commanded. After all, that's what he instructed his disciples to teach (Matthew 28:19-20).