APPENDIX A. 207 



have been thoroughly tested. Nothing to do with 

 others/' 



" Question thyself to learn what will please 

 others/' 



" No useless discourse. All conversation which 

 does not serve to enlighten ourselves or others, 

 to interest the heart or amuse the mind, is hurt- 

 ful." 



" Speak little of what you know, and not at all 

 of what you do not know." 



"Why not say more frequently, 'I do not 

 know'?" 



" Speak to every one of that which he knows 

 best. This will put him at his ease, and be profit- 

 able to you/' 



"Abstain from all pleasantry which could 

 wound." 



" Employ only expressions of the most perfect 

 propriety. " 



" Listen attentively to your interlocutor, and so 

 prepare him to listen in the same way to your reply, 

 and predispose him in favor of your arguments." 



" Show neither passion nor weariness in discus- 

 sion." 



' ' Never direct an argument against any one. If 

 you know some particulars against your adversary, 

 you have a right to make him aware of it to keep 



