Can we preach and teach until all the unsaved get saved? Some people believe so. I believe in both activities with all my heart. But the great mass of people will not hear you. They cannot, because they are the devil's children, simple as that.
I have no great idea for laying out the whole Bible for anyone. It is just to read the beginning of the Gospel of John. Here we find, in plain language, that there are two kinds of people. God's people and the devil's children. These latter are, by far, the great majority.
Like the way the world is going? We are experiencing the result of the devil's world coming to fruition. It is completed in the book of Revelation. Nothing we do can change this course of events.
Imagine a great flood predicted to come. Can anyone stop it? What would your response be? It could be to take refuge in a big boat, as Noah did. Or it could be to move to higher ground.
I expect to be taken out of the world entirely. We all will be. The church is to be "air lifted" to a safe location (Revelation 3:10). After this occurs, the culmination of the wicked will take place. Kind of like Lot escaping Sodom. The fire was held back until he was safely away.
Why do ye not understand my speech? even because ye cannot hear my word. Ye are of your father the devil, and the lusts of your father ye will do. John 8:43, 44