Communicativeness-Uncommunicativeness

We are least open to precise knowledge concerning the things we are most vehement about. (Eric Hoffer)

Knowledge can be communicated, but not wisdom. One can find it, live it, be fortified by it, do wonders through it, but one cannot communicate and teach it. (Hermann Hesse)

Whoever interrupts the conversation of others to make a display of his fund of knowledge, makes notorious his own stock of ignorance. (Sa'di)

Wisdom sets bounds even to knowledge. (Nietzsche)

Often, the surest way to convey misinformation is to tell the strict truth. (Mark Twain)

Human society is founded on mutual deceit; few friendships would endure if each knew what his friend said of him in his absence. (Pascal)

All cruel people describe themselves as paragons of frankness. (Tennessee Williams)