It is not best to swap horses while crossing the river

Tact: the ability to describe others as they see themselves.

Tact is the art of making guests feel at home when that's really where you wish they were.

The occasion is piled high with difficulty, and we must rise high with the occasion

Don't swap horses in crossing a stream.

An old Dutch farmer, who remarked to a companion once that it was not best to swap horses when crossing a stream.