From the Didache

.....via the Bruderhof:

Early Christian Advice
The Didache

My child, flee from all evil and from everything resembling it. Do not get angry, for anger leads to murder. My child, do not grumble, for this leads to blasphemy; be gentle-minded, for those of a gentle mind shall possess the earth. Be patient and have a loving heart. Do not be one who stretches out his hands to receive but closes them when it comes to giving. If you have earned something by the work of your hands, pass it on as a ransom for your sins. Do not turn away from those who are in need, but share all things in common with your brother. Your heart shall not cling to the high and mighty, but turn to the good and humble folk. Accept as good whatever happens to you or affects you, knowing that nothing happens without God.