Who can distinguish darkness from the soul? - William Butler Yeats

"Before me floats an image, man or shade,
Shade more than man, more image than a shade;
For Hades' bobbin bound in mummy-cloth
May unwind the winding path;
A mouth that has no moisture and no breath
Breathless mouths may summon;
("Byzantium")"

All the wild-witches, those most notable ladies
For all their broom-sticks and their tears,
Their angry tears, are gone.

Things said or done long years ago,
Or things I did not do or say
But thought that I might say or do,
Weigh me down, and not a day
But something is recalled,
My conscience or my vanity appalled.