"Übermensch", the superman/overman,  was first expressed by Friedrich Nietzsche in his book "Thus Spoke Zarathustra".  Although it has been regarded as only a philosophical concept; the Übermensch actually alludes to a true direct experience (and the evidence) of a consciousness that is total, undivided. 
 

This IS FOR men who aren't necessarily drawn to any path in particular  (spiritual or otherwise).