imperceivable

When you bet on a crowd the odds become imperceivable.

It is a genuine history of an idea in art, a fascination with the immaterial and imperceivable that can be traced back to the audacious claims of Yves Klein in late 1950s Paris to create invisible atmospheres and "air architecture", most famously in his 1958 exhibition of nothing, The Void.

Forces, on the other hand, are the imperceivable relations of dependence which we must presuppose between events that follow one another uniformly, if the uniformity of this sequence is to become for us either thinkable or conceivable.

Some memory of its windings, together with the instinct of a woodsman, must have given guidance, while no doubt his feet, clad in soft Indian moccasins, enabled him to feel the faint track, imperceivable in the darkness.

The idea of drawing a line between perceivable or rational truths and imperceivable or divine truths, is fraught with the burning question as to the limits of human knowledge, a question which to this day remains unanswered.