'Hard' in the Bible

I have knowledge of your doings, and of your hard work and long waiting, and that you will not put up with evil men, and have put to the test those who say they are Apostles and are not, and have seen that they are false;

Then I heard a voice from heaven say, "Write this: 'Blessed are the dead, those who die in the Lord from this moment on!'" "Yes," says the Spirit, "so they can rest from their hard work, because their deeds will follow them."