Full Idea
It is not sufficient for honesty that a person tells whatever she happens to believe is the truth. An honest person is careful with the truth.
Gist of Idea
For the virtue of honesty you must be careful with the truth, and not just speak truly
Source
Linda Trinkaus Zagzebski (Virtues of the Mind [1996], II 3.2)
Book Reference
Zagzebski,Linda: 'Virtues of the Mind' [CUP 1996], p.158
A Reaction
Not sure about that. It matches what Aristotle says about courage, which also needs practical reason [phronesis]. But being sensitive and careful with truth seems to need other virtues. If total honesty is not a virtue, then is honesty a virtue at all?