It pays to be obvious, especially if you have a reputation for subtlety. Isaac Asimov
The more original a discovery, the more obvious it seems afterwards. Arthur Koestler
Never assume the obvious is true. William Safire
Familiar things happen, and mankind does not bother about them. It requires a very unusual mind to undertake the analysis of the obvious. Alfred North Whitehead
If we think about the obvious long enough, it dissolves. Mason Cooley
To spell out the obvious is often to call it in question. Eric Hoffer