Supposing is good, but finding out is better. - Mark Twain
It is undesirable to believe a proposition when there is no ground whatsoever for supposing it is true. - Bertrand Russell
To suppose, as we all suppose, that we could be rich and not behave as the rich behave, is like supposing that we could drink all day and keep absolutely sober. - Logan Pearsall Smith
If all was told, supposing there lived a person who could tell all, there would be no mysteries left, and the would be very bad. Man cannot live without mystery. He had a great need of it. - Lame Deer Seeker of Visions
We live our lives supposing things are as they appear to be when that is almost never the case. - Richelle E. Goodrich
Mankind have a great aversion to intellectual labor; but even supposing knowledge to be easily attainable, more people would be content to be ignorant than would take even a little trouble to acquire it. - Samuel Johnson