Matthew 24:13

After listing the various bad things that will happen, Jesus says:

ὁ δὲ ὑπομείνας εἰς τέλος οὗτος σωθήσεται.

He who endures to the end, that one will be saved (Matthew 24:13).

It is the one who endures, or remains steadfast, to the end, through the suffering, the famines, the earthquakes, the plagues, the wars, the afflictions, the false prophets, the false Christs, the hatred, the persecutions, the betrayals, the assassinations, who will be saved. Jesus tells his followers that they can expect rather dreadful times and rather dreadful treatment. And yet, at the end they will be saved.