Frankness is usually a euphemism for rudeness.
There is no wisdom like frankness.
The 'frankness' of people sunk below shame is a very cheap frankness.
He that openly tells, his friends all that he thinks of them, must expect that they will secretly tell his enemies much that they do not think of him.
We are franker towards others than towards ourselves.
Frankness is a jewel; only the young can afford it.