Answer my friend is blowing in the wind...

One man's (or women's) answer can be the cue to a series of discoveries for another.When we think(or assume) that we know something,how sure are we?...very often when we think we have found an asnwer to a long disturbing query,there comes a new angle..a new perspective..a new discovery...but it will only come when we can recognise it..else it would never be seen.What we see may not exist..and what exists may not be seen by us at all.To make it more complex,we may see something,when something else exists.What am I pointing to...is that how sure can be we be about our answers ?... and on a more broad perspective how certain are we of our knowledge..of our existence and of our certianties ? An existential question -Do we really exist at all-If not then how would we know and how long would that take us to realise.Are we then not ..living on the Edge...