All the manifested world of things and beings are projected by imagination upon the substratum which is the Eternal All-pervading Vishnu, whose nature is Existence-Intelligence; just as the different ornaments are all made out of the same gold.
Be what you would seem to be - or, if you'd like it put more simply - never imagine yourself not to be otherwise than what it might appear to others that what you were or might have been was not otherwise than what you had been would have appeared to them to be otherwise.
The human understanding is moved by those things most which strike and enter the mind simultaneously and suddenly, and so fill the imagination; and then it feigns and supposes all other things to be somehow, though it cannot see how, similar to those few things by which it is surrounded.
People read a lot of stories about witches, fairies, paranormals, and children possessed by evil spirits. They go to films showing rituals featuring pentagrams, swords, and invocations. That's fine, people need to give free reign to their imagination and to go through certain stages. Anyone who gets through those stages without being deceived will eventually get in touch with the Tradition.
Use makes a better soldier than the most urgent considerations of duty,--familiarity with danger enabling him to estimate the danger. He sees how much is the risk, and is not afflicted with imagination; knows practically Marshal Saxe's rule, that every soldier killed costs the enemy his weight in lead.
In your own bosom you bear your heaven and earth,
And all you behold, though it appears without,
It is within, in your imagination,
Of which this world of mortality is but a shadow.
Literature is a beautiful way of keeping the imagination alive, of visiting worlds you would never have time to in your day-to-day life. It keeps you abreast of a wider spectrum of human activities.
The chief imagination of Christendom,
Dante Alighieri, so utterly found himself
That he has made that hollow face of his
More plain to the mind's eye than any face
But that of Christ.
The appeal of the spectrally macabre is generally narrow because it demands from the reader a certain degree of imagination and a capacity for detachment from everyday life.