11 Righteous men have ever possessed this endurance. The apostles maintained this discipline from the law of the Lord, not to murmur in adversity, but to accept bravely and patiently whatever things happen in the world; since the people of the Jews in this matter always offended, that they constantly murmured against God, as the Lord God bears witness in the book of Numbers, saying, “Let their murmuring cease from me, and they shall not die.” We must not murmur in adversity, beloved brethren, but we must bear with patience and courage whatever happens, since it is written, “The sacrifice to God is a broken spirit; a contrite and humbled heart God does not despise;” since also in Deuteronomy the Holy Spirit warns by Moses. and says, “The Lord your God will vex you, and will bring hunger upon you; and it shall be known in your heart if you have well kept His commandments or no.” And again: “The Lord your God proves you, that He may know whether you love the Lord your God with all your heart, and with all your soul.”
Source: The Treatises of Cyprian (New Advent)