1 Strive not with a mighty man' lest thou fall into his hands. 2 Be not at variance with a rich man, lest he overweigh thee: for gold hath destroyed many, and perverted the hearts of kings. 3 Strive not with a man that is full of tongue, and heap not wood upon his fire. 4 Jest not with a rude man, lest thy ancestors be disgraced. 5 Reproach not a man that turneth from sin, but remember that we are all worthy of punishment. 6 Dishonour not a man in his old age: for even some of us wax old. 7 Rejoice not over thy greatest enemy being dead, but remember that we die all. 8 Despise not the discourse of the wise, but acquaint thyself with their proverbs: for of them thou shalt learn instruction, and how to serve great men with ease. 9 Miss not the discourse of the elders: for they also learned of their fathers, and of them thou shalt learn understanding, and to give answer as need requireth. 10 Kindle not the coals of a sinner, lest thou be burnt with the flame of his fire. 11 Rise not up [in anger] at the presence of an injurious person, lest he lie in wait to entrap thee in thy words 12 Lend not unto him that is mightier than thyself; for if thou lendest him, count it but lost. 13 Be not surety above thy power: for if thou be surety, take care to pay it. 14 Go not to law with a judge; for they will judge for him according to his honour. 15 Travel not by the way with a bold fellow, lest he become grievous unto thee: for he will do according to his own will, and thou shalt perish with him through his folly. 16 Strive not with an angry man, and go not with him into a solitary place: for blood is as nothing in his sight, and where there is no help, he will overthrow thee. 17 Consult not with a fool; for he cannot keep counsel. 18 Do no secret thing before a stranger; for thou knowest not what he will bring forth. 19 Open not thine heart to every man, lest he requite thee with a shrewd turn.
[AD 253] Origen of Alexandria on Sirach 8:5
There is a person full of faith who comes forward in the assembly and accuses himself, making everyone aware of some sin he has committed. And yet, those who themselves have no fear of God’s future judgment, on hearing his words, instead of suffering with him who suffers, instead of burning with him who is offended, instead of falling with him who is fallen, say, Get away from me and don’t come near me because I am pure! Then they begin to curse this person whom they previously admired and withdraw their friendship from this person who did not want to conceal his crime. Conveniently they say of those who make the confession, “My friends and companions stand aloof from my plague, and my kin stand afar off.” It is not the case, however, that he ought to be afraid of the behavior of others when, after having committed a sin, he desires to save himself, nor should he fear the reproaches of those who do not think about their own sins or recall the words of the divine Scriptures: “Do not insult a person converted from sin, remember that we all deserve punishment.” Do not worry about such things. Instead, worry about your soul, and pray to God that he may hear you and raise you after you fall so that you will be able to say also that which follows: “I confess my iniquity; I am sorry for my sin.”

[AD 856] Rabanus Maurus on Sirach 8:9
The apostle Peter recommends, “In your hearts reverence Christ as Lord. Always be prepared to make a defense to anyone who calls you to account for the hope that is in you.” It is good for a servant of God to learn from his masters with diligence and commitment what afterwards he must teach to others with prudence and for their benefit. Because if he does not and instead is lazy and indolent in applying himself, he will turn out to be useless in teaching others later.

[AD 339] Eusebius of Caesarea on Sirach 8:10
Saul chased David, who in fact carried out these words, “When they persecute you in this city, flee into another.” He fled in order not to irritate his enemy with his presence and to become for him a reason to spill blood. In fact, David grasped the saying, “Do not incite the arm of a sinner,” better than anyone. This is why he withdrew and moved away, although he was loved by all the people and had many who shared his pains and his sorrow and who would have been able to receive him and hide him in their homes. But, in order not to become a cause of danger to others, he fled into the desert and preferred to live in caves. It seems to me that the holy apostle also alludes to him when he says, “They wandered in deserts, in the mountains, in dens and in caves of the earth.”

[AD 407] John Chrysostom on Sirach 8:13
Consider, dearly beloved, those who vouch for someone concerning money, how they have to submit themselves to a greater risk than the one who is responsible for and receives the money. Indeed, if the person who has received the loan shows himself benevolent, he pays back what he owes to the person who has given the guarantee; but if he turns out to be bad, he prepares a much larger disaster for the person who has vouched for him. For this reason a wise man warned, “If you give surety, be concerned as one who must pay.” Now then, if those who vouch for someone concerning money render themselves responsible for everything, how much more do those who vouch for someone relating to spiritual things and on the theme of virtue must demonstrate great vigilance, exhorting, advising, correcting and revealing paternal affection. And they should understand that what is happening should not be taken lightly but that their own reputation is at stake. There will be mutual benefit if through their personal admonition they lead them someone onto the road of virtue, while a grave condemnation will be incumbent on them if they neglect to do so. For this reason, it is customary to call these people spiritual parents, so that they may learn what affection they must demonstrate for them with their own deeds in the teaching of spiritual things. If it is good to push those to embrace virtue with whom we have no relationship, how much more must we carry out this command regarding someone whom we receive whom we call a spiritual son or daughter.