Acts 1:8 - But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.

God commands us to go tell others about Him, but He doesn't leave us powerless. The word for power in this verse is the same word for dynamite. God gives us explosive power to do His will. We, therefore, have no excuse!