Although they can be found in the PDF Black Book of Satan, this comes from Joy of Satan.
I find this poem very comforting, so I'm posting this in the hope that others will do so too.
My understanding surrounds the truth of things,
And the truth is mixed up in me,
And the truth of my descent is set forth by itself,
And when it was known, it was altogether in me
And all the habitable parts and deserts
And everything created is under me
And I am the ruling power preceding all that exists
And I am he that spoke a true saying
And I am the Just Judge and Ruler of the Earth
And I am he that men worship in my glory
Coming to me and kissing my feet
And I am he that spread over the heavens their height
And I am he that cried in the beginning
And I am he that of myself revealeth all things,
Verily the all-merciful has assigned unto me names,
The heavenly-throne, and the seat, and the heavens, and the earth.
In the secret of my knowledge, there is no god but me.
These things are subservient to my power.
O mine enemies, why do you deny me?
O men deny me not, but submit.
In the Day of Judgment, you will be happy in meeting me.
Who dies in my love, I will cast him
In the midst of paradise, by my will and pleasure;
But he that dies unmindful of me
Will be thrown into torture in misery and affliction.
I say I am the only one and the exalted;
I create and make rich those whom I will.
Praise it to myself, for all things are by my will,
And the universe is lighted by some of my gifts.
I am the king that magnifies himself,
And all the riches of creation are at my bidding.
I have made known unto you, o people, some of my ways.
So saith Shaitan