The parable of the mote and the beam comes to mind... however, I'll let that go, just.
Currently reading Rebecca West's wonderful account of the Balkans in the 1930's, "Black Lamb, Grey Falcon", a book that's typeset (not to mention written) to perfection (first edition at least), I note that it's set with single spaces before semi-colons. I feel a responsibility to notify participants on this forum.
Roy