5. Now what ought we to learn before everything else, but to be silent, that we may be able to speak? lest my voice should condemn me, before that of another acquit me; for it is written: “By thy words thou shalt be condemned.” S. Matt. xii. 37. What need is there, then, that thou shouldest hasten to undergo the danger of condemnation by speaking, when thou canst be more safe by keeping silent? How many have I seen to fall into sin by speaking, but scarcely one by keeping silent; and so it is more difficult to know how to keep silent than how to speak. I know that most persons speak because they do not know how to keep silent. It is seldom that any one is silent even when speaking profits him nothing. He is wise, then, who knows how to keep silent. Lastly, the Wisdom of God said: “The Lord hath given to me the tongue of learning, that I should know when it is good to speak.” Is. l. 4 [LXX.]. Justly, then, is he wise who has received of the Lord to know when he ought to speak. Wherefore the Scripture says well: “A wise man will keep silence until there is opportunity.” Ecclus. xx. 7.