If the whole world rejects you, and you follow God's word and live openly and honestly for Him, God is for you. What does it matter then if the whole world is against you? 

We should have the same attitude that Luther had when he had to face the Diet of Worms to defend his 95 theses in front of the emperor and the Catholic Church. It was life-threatening, for the pope had excommunicated Luther. 

Boldly, Luther said: «Even if there were as many devils in Worms as there are tiles on the houses, I will still go there.» He defied threats of punishment and death, went to Worms, and emerged victorious from the dangers. This teaches us that we must dare to stand for what we know is true. Paul says:

«If God is for us, who can be against us?»

Rom 8:31 (NKJV)

The truth cannot die!