Revelation 8:4
And the smoke of the incense, which came with the prayers of the saints, ascended up before God out of the angel's hand.

I find this to be very interesting about the incense, and the saint's prayers, why?
Christians don't believe in burning incense. Let's look at this closer

Premise 1: The word of God associates his saint's with burning incense
Premise 2: Christians will not burn incense (or do any ritual), and believe it is of the devil
Conclusion: The majority of people claiming to be Christians can't be the saints
spoken of by the bible

Amos 8:11

Behold, the days come, saith the Lord God, that I will send a famine in the land, not a famine of bread, nor a thirst for water, but of hearing the words of the Lord:

Since Christianity and their doctrine has literally reached everyone, how can there be a famine of the word if their doctrine is the same as God's doctrine?