A person may shut themselves up in a dark room, and deny that the light exists, but it is everywhere without, and darkness exists only in their own little room.
So you may shut out the light of Truth, or you may begin to pull down the walls of prejudice, self-seeking and error which you have built around yourself, and so let in the glorious and omnipresent Light.
By earnest self-examination strive to realize, and not merely hold as a theory, that evil is a passing phase, a self-created shadow; that all your pains, sorrows and misfortunes have come to you by a process of undeviating and absolutely perfect law; have come to you because you deserve and require them, and that by first enduring, and then understanding them, you may be made stronger, wiser, nobler.
When you have fully entered into this realization, you will be in a position to mould your own circumstances, to transmute all evil into good and to weave, with a master hand, the fabric of your destiny.
(Source: james-allen.in1woord.nl )