Luk 4:43
But he said unto them,
I must preach the good tidings of the kingdom of God to the other cities also: for therefore was I sent.
Act 28:30
And he abode two whole years in his own hired dwelling, and received all that went in unto him,
Act 28:31
preaching the kingdom of God, and teaching the things concerning the Lord Jesus Christ with all boldness, none forbidding him.
Mar 1:14
Now after John was delivered up, Jesus came into Galilee, preaching the gospel of God,
Mar 1:15
and saying,
The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe in the gospel.
Act 8:12
But when they believed Philip preaching good tidings concerning the kingdom of God and the name of Jesus Christ, they were baptized, both men and women.
The good news of the coming Kingodm of God when Christ VISIBLY returns to the EARTH so the meek can inherit it is the good news. We will be made kings and priests and rule UPON the earth forever. (Matthew 5:5, Revelation 5:10)
The witnesses believe in the invisible kingdom, invisible Jesus, and invisible people. Satan is very good at deceiving people into believing things that are not really there yet... EVERY EYE WILL SEE JESUS when he returns...That is the good news... Not some false rider of the white horse in Revelation 6 who is actually the anti Christ.
Boo