The most offensive is not their lying - one can always forgive lying - lying is a delightful thing, for it leads to truth - what is offensive is that they lie and worship their own lying.
I would not be like those Authors, who forgive themselves some particular lines for the sake of a whole Poem, and vice versa a whole Poem for the sake of some particular lines. I believe no one qualification is so likely to make a good writer, as the power of rejecting his own thoughts.
People may fail many times, but they become failures only when they begin to blame someone else. Always forgive your enemies; nothing annoys them so much.