1 Do not rely on your wealth, or say, "I have enough." 2 Do not follow your inclination and strength in pursuing the desires of your heart. 3 Do not say, "Who can have power over me?" for the Lord will surely punish you. 4 Do not say, "I sinned, yet what has happened to me?" for the Lord is slow to anger. 5 Do not be so confident of forgiveness that you add sin to sin. 6 Do not say, "His mercy is great, he will forgive the multitude of my sins," for both mercy and wrath are with him, and his anger will rest on sinners. 7 Do not delay to turn back to the Lord, and do not postpone it from day to day; for suddenly the wrath of the Lord will come upon you, and at the time of punishment you will perish. 8 Do not depend on dishonest wealth, for it will not benefit you on the day of calamity. 9 Do not winnow in every wind, or follow every path. 10 Stand firm for what you know, and let your speech be consistent. 11Be quick to hear, but deliberate in answering.12 If you know what to say, answer your neighbor; but if not, put your hand over your mouth. 13Honor and dishonor come from speaking, and the tongue of mortals may be their downfall.14 Do not be called double-tongued and do not lay traps with your tongue; for shame comes to the thief, and severe condemnation to the double-tongued. 15 In great and small matters cause no harm,
Date: 195-175 B.C.E. (based on scholarly estimates)
Pirkei Avot 1:15
15Shammai used to say: make your [study of the] Torah a fixed practice; speak little, but do much; and receive all men with a pleasant countenance.16 Rabban Gamaliel used to say: appoint for thyself a teacher, avoid doubt, and do not make a habit of tithing by guesswork. 17Shimon, his son, used to say: all my days I grew up among the sages, and I have found nothing better for a person than silence. Study is not the most important thing, but actions; whoever indulges in too many words brings about sin.