Something that blows my mind whenever I think about it:

Pi is an irrational number; it is infinite, and its digit sequences are non-repeating. Therefore, contained within Pi is every combination of every length of numbers approaching infinity.

So if you select an arbitrary system for encoding base-10 digits to, say, ASCII characters, then contained within Pi is every combination of every length of letters (and therefore words) approaching infinity.

Contained within Pi is this message, a 1,000 page discourse on the merits of leg waxing, and the combined works of William Shakespeare. As well as a variation of The Tempest where Caliban turns out to be a cross-dressing lounge singer.

Pi is the ultimate in infinite monkey simulations.