.
You don’t have to, but you should.
.

.
Aside from every phone number of every place I have ever lived?
This:
Abou Ben Adhem
BY LEIGH HUNT
Abou Ben Adhem (may his tribe increase!)
Awoke one night from a deep dream of peace,
And saw, within the moonlight in his room,
Making it rich, and like a lily in bloom,
An angel writing in a book of gold:—
Exceeding peace had made Ben Adhem bold,
And to the presence in the room he said,
“What writest thou?”—The vision raised its head,
And with a look made of all sweet accord,
Answered, “The names of those who love the Lord.”
“And is mine one?” said Abou. “Nay, not so,”
Replied the angel. Abou spoke more low,
But cheerly still; and said, “I pray thee, then,
Write me as one that loves his fellow men.”
The angel wrote, and vanished. The next night
It came again with a great wakening light,
And showed the names whom love of God had blest,
And lo! Ben Adhem’s name led all the rest.
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If you know me, you know I’m one of the least religious people you’re ever apt to meet, but my late mother was forced to memorize that poem as a child and recited it ad nauseam during my formative years. Why it has remained firmly implanted in my brain I have no idea… but there it is. Uselessly taking up space.
So how about you? What useless thing are you storing in your grey matter…