Jesus told his disciples that he will return only once and that when he does, after a time of great tribulation, it will be visible to everyone and be followed by immediate and dire consequences for those unprepared and for those who were adversaries of God.
All Christians are commissioned and obligated to be evangelizers wherever they are, in that they preach the good news to all sorts of men.
In Scriptures people are asked to teach their children diligently and to go out to tell everybody and to reason about the importance of faith in Christ, Jeshua or Jesus Christ being the sent one from and son of God bringing people to God and to salvation..
2000 years ago Jesus spoke about such teachers who think they are the only ones who can explain the Bible. Today people should be aware that it is the Scriptures itself that can explain everything and that it is Jeshua, Jesus Christ, whom we should follow as the most perfect teacher.
It is striking that there are a lot of people in the world who are opposed to those who worship Jehovah as their only true God. The vast majority of those anti-Jehovah people come from extreme right-wing groups and fundamentalist or very conservative Christian groups.
When we look in the Bible at the infallible Words of God, Who does not tell lies, we can find that the God of Christ Who should be also our God, is One Singular Spirit Being Who is greater than Jesus and any other human being, also having lots of attributes which surpass those of man.