Do not interrupt the other person by pretending to anticipate his or her thoughts
Fifthly, it is impolite to forestall a question or to interrupt others in order to parade one's facility in responding to everything. Such vanity betrays weak-mindedness.
Your example
We do not love people so much for the good they have done us, as for the good we do them.
Love does not consist of gazing at each other, but in looking outward together in the same direction.
It is not a lack of love, but a lack of friendship that makes unhappy marriages.
Civility and politeness essentially consist, if I am not deceived, in a kind way of dealing and conversing with others ...
[Oprah Winfrey said in one of the interview she was giving :]
"There’s a wonderful phrase by Maya Angelou, from a poem that she wrote called “To our grandmothers”, that she says:
“I come as one, but I stand as ten thousand.”
So when I walk into a room, particularly before I have something really challenging to do, or I’m going to be in a circumstance where I feel I’m going to be you know, up against some difficulties. I will literally sit, and I will call on the 10,000."
Note : the actual phrase in the poem is : "I go forth along, and stand as ten thousand."