Better to trip with the feet than with the tongue.
---Zeno of Citium (334 – 262 BC)
(28:6.20) And the manifestation of greatness on a world like Urantia is the exhibition of self-control. The great man is not he who "takes a city" or "overthrows a nation," but rather "he who subdues his own tongue."
(146:2.13) Jesus commented at great length on the relation of prayer to careless and offending speech, quoting: "Set a watch, O Lord, before my mouth; keep the door of my lips." "The human tongue," said Jesus, "is a member which few men can tame, but the spirit within can transform this unruly member into a kindly voice of tolerance and an inspiring minister of mercy."
(180:5.5) The golden rule, when divested of the superhuman insight of the Spirit of Truth, becomes nothing more than a rule of high ethical conduct. The golden rule, when literally interpreted, may become the instrument of great offense to one's fellows. Without a spiritual discernment of the golden rule of wisdom you might reason that, since you are desirous that all men speak the full and frank truth of their minds to you, you should therefore fully and frankly speak the full thought of your mind to your fellow beings. Such an unspiritual interpretation of the golden rule might result in untold unhappiness and no end of sorrow.
(181:2.27) Then the Master went over to Simon Peter, who stood up as Jesus addressed him: "Peter, I know you love me, and that you will dedicate your life to the public proclamation of this gospel of the kingdom to Jew and gentile, but I am distressed that your years of such close association with me have not done more to help you think before you speak. What experience must you pass through before you will learn to set a guard upon your lips? How much trouble have you made for us by your thoughtless speaking, by your presumptuous self-confidence! And you are destined to make much more trouble for yourself if you do not master this frailty. You know that your brethren love you in spite of this weakness, and you should also understand that this shortcoming in no way impairs my affection for you, but it lessens your usefulness and never ceases to make trouble for you.
Zeno of Citium was a Hellenistic philosopher of Phoenician origin from Citium, Cyprus. Zeno was the founder of the Stoic school of philosophy, which he taught in Athens from about 300 BC. Based on the moral ideas of the Cynics, Stoicism laid great emphasis on goodness and peace of mind gained from living a life of Virtue in accordance with Nature. It proved very popular, and flourished as one of the major schools of philosophy from the Hellenistic period through to the Roman era.