The reasons for which 'this' world has been characterized as 'apparent' are the very reasons which indicate its reality; any other kind of reality is absolutely indemonstrable.
RACK, n. An argumentative implement formerly much used in persuading devotees of a false faith to embrace the living truth. As a call to the unconverted the rack never had any particular efficacy, and is now held in light popular esteem.
Every discourse is an approximate answer: but it is of small consequence, that we do not get it into verbs and nouns, whilst it abides for contemplation forever.