Preaching is the means by which one is able to understand how to get to Heaven.
1 Corinthians 1:18, For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God.
The most important message you will ever hear is the message of the Gospel of Jesus Christ. It is the message for you to repent of your sins and trust Jesus Christ as Saviour. Have you heard it? Did you believe it? Did you act upon it? Did you get saved? If so, it’s because some one preached the Word of God to you.