Mat 19: 30 and Mark 10: 31
But many of the first will be last, and the last will be first.
Many of the first refers to those who were alive during the time of Christ and His miracles, or within the first couple of generations, they actually saw these things or knew people who saw the events making it easer to believe. The last are those who believe after thousands of years. As time passes, it is harder for the world to accept the Word. With so many trying to distort the Word into a myth, it is getting harder to find absolute faith.