For by the grace given to me I say to everyone among you not to think of himself more highly than he ought to think, but to think with sober judgment, each according to the measure of faith that God has assigned.
We might know all things but that does not mean that we should weaken the faith of anyone by words or acts.
Matthew 13:49 So it will be at the end of the age. The angels will come out and separate the evil from the righteous
Matthew 24:14 And this gospel of the kingdom will be proclaimed throughout the whole world as a testimony to all nations, and then the end will come.
My motive is to obey by faith to bring about an end. What that looks like is beyond my control.
I want to make this as clear as I can, I am not in control of what is to end. All I can do is just preach the gospel as far and wide as I can in the short amount of time I have left.
A witness can only declare what he has seen. He has no control over the outcome.