Other Fish to Fry

By the time we figure out how to time travel we will no loner want to.

Proof

The religiously inclined would do well not forget that even if God's benign face were to appear in the sky one sunny day and remain there theologically speaking things would be far from settled.

Categories

Were a butterfly collector to catch in in his butterfly net the rarest and most unusual butterfly chance are he would fail to see it as a butterfly at all and release it. 

A Question

Which is greater knowing or forgetting? 
(I once knew the answer but have since forgotten.)