“Pi. The ratio of the circumference of a circle to its diameter.
And this is just the beginning. It keeps on going. Forever. Without ever repeating.
Which means that contained within this string of decimals is every single other number. Your birth date, combination to your locker, your social security number.
It’s all in there somewhere. 
And if you convert these decimals into letters, you would have every word that ever existed in every possible combination.
The first syllable you spoke as a baby, the name of your latest crush, your entire life story from beginning to end.”