【Faults of not relying on the Teacher】- nonvirtuous friends are like arrows smeared with poison 

【The person who relies on the unreliable 
  Will have faults as a result, 
  Just as unsmeared arrows are tainted 
 When arrows smeared with poison are placed in the same quiver. 】
 
 Actually, once you are close to him, not only will your reputation be ruined – what will happen in reality? Just like this! As soon as you rely on him, very sorry, all his flaws will taint you. Just like putting the poison-covered arrows in your quiver, the arrows smeared with poison – anything they touch will be contaminated by poison! Any part that touches it will be poisoned! Even though you are not poisoned, as soon as you come into contact with it, you are doomed! 
Thus, 

【By relying on the nonvirtuous teachers, your previously existent wrongdoing—deeds wrong by nature and deeds wrong by prohibition—does not diminish, and new wrongdoing increases.  】
 
This is the characteristic of a nonvirtuous teacher. Once you rely on him, the wrongdoings – the deeds wrong by nature and deeds wrong by prohibition, all the nonvirtuous causes – once they arise, you cannot diminish them. As a Buddha Dharma practitioner, what [wrongdoings] we had before, [we] need to diminish them. Now you are close to someone and cannot diminish [the wrongdoings]. Not only are you unable to diminish them, but also whatever wrongdoing you did not have, he will make you increase. We should apply the teaching to remove them and do the exact opposite! So, in order to apply the teaching, [we] need to rely on virtuous teachers and avoid nonvirtuous ones.  

SOURCE 来源 :

22A 10’03” Vol 3 of Master Jih-Chang’s Discourse P185 L3
English Lamrim Vol 1 P91

日常师父法语📡22A 10’03” 手抄稿第3册P185 L3

未依过患 : 恶知识如毒箭

【人近非应亲，由彼过成过，如毒箭置囊，亦染无毒者。]】

实际上呢，你一旦亲近他了以后，不但名誉坏—实际上状态呢？就这个！你一亲近他，对不起，他的过错你都沾上了。就像那个毒箭放在你的袋里一样，那个毒箭沾了那个，碰到什么，什么地方就中毒！碰到什么，什么地方中毒！虽然你自己不毒，可是你靠在那个地方，一靠近，你也完了！所以，

【恶知识者，谓若近谁能令性罪遮罪恶行，诸先有者不能损减，诸先非有令新增长。】

这个就是恶知识的特征。一靠近他，那个罪过，性罪、遮罪种种恶因，以前有的你不能减。我们修行佛法，以前有的，要减掉它，现在你靠到了，不能减；不但不能减，你原来没有的，他也会让你增长。我们修行应该去掉它，跟他相反吧！所以它修行要靠善知识，要远离恶知识。