C.N. Douglas, comp. Forty Thousand Quotations: Prose and Poetical. 1917.
Discrimination
I will buy with you, sell with you, talk with you, walk with you, and so following, but I will not eat with you, drink with you, nor pray with you.
Shakespeare.
You aught to choose both physician and friend, not the most agreeable, but the most useful.
Epictetus.