Matthew 28:18 - "And Jesus came and spake unto them, saying , All power is given unto me in heaven and in earth." - Jesus did not simply command us to preach the gospel without having any authority to do so. In fact He has ALL authority and ALL POWER!! He said thatwe can go in His name and depend on His power. This means that we don't have to try in our fleshly power, we can rely on the Almighty's power. So let's go!