Nothing is more easily blotted out than a good turn. [ Proverb ]

Cleaning a blot with blotted fingers makes a greater blur. [ Proverb ]

Here are a few of the unpleasantest words that ever blotted paper! [ William Shakespeare ]

The accusing spirit, which flew off to heaven's chancery with the oath blushed as he gave it in; and the recording angel, as he wrote it down, dropped a tear upon the word and blotted it out forever. [ Sterne ]

I bet a fun thing would be to go way back in time to where there was going to be an eclipse and tell the cave men, If I have come to destroy you, may the sun be blotted out from the sky. Just then the eclipse would start, and they'd probably try to kill you or something, but then you could explain about the rotation of the moon and all, and everyone would get a good laugh. [ Jack Handey, Deep Thoughts ]