The Two Ronnies had some good ones:

No matter how hot the day -- in the night it will be dark.

Many a true word is spoken through false teeth.

Also anything by "Kosma Prytkov", the creation of Alexei Tolstoi, found at a number of websites. Example: Which is more important, the sun or the moon? the moon, of course, because it shines at night, while the sun shines during the day, when it is light already.

Cheers, Joy