The Instructions of Ptah-Hotep 

The Role of the Tutor to the Son of the Master

Instruct a noble in such things as be profitable unto him; cause that he be received among men. Let his satisfaction fall on his master, for your provision depends upon his will. By reason of it your belly shall be satisfied; your back will be clothed thereby. Let him receive your heart, that your house may flourish and your honor-if you wish it to flourish- thereby. 

He shall extend you a kindly hand. Further, he shall implant the love of you in the bodies of your friends. Forsooth, it is a soul loving to hearken.