“I will bring the one–third through the fire,
Will refine them as silver is refined,
And test them as gold is tested.
They will call on My name,
And I will answer them.
I will say, ‘This is My people’;
And each one will say, ‘The Lord is my God.’” Zechariah 13:9

It is very frightening and difficult to understand that God will allow two thirds of the population in the world to be cut off from Him and die. But this is the truth and will happen in God’s perfect time.
The remanent who survive the wrath and judgment of God will be the people who believe in the name of Jesus and will not accept any attack to destroy their God or turn to worship false gods. They will call on the name of Jesus even when facing death.
If you really want a heart for God, you will be taken through the fires, you will suffer for your beliefs, and you will die to self and become refined with the nature of God. You will also be severely tested to determine the strength of your faith.
Through all the trials of life, you will call on the name of Jesus and never depart from His sanctuary. God will respond to your faith with these words “This one belongs to Me forever.”