Big Moat Stocks (formerly Rule 1 Numbers)

Your goal as an investor should simply be to purchase, at a rational
price, a part interest in an easily-understandable business whose
earnings are virtually certain to be materially higher five, ten and
twenty years from now. Over time, you will find only a few companies
that meet these standards - so when you see one that qualifies, you
should buy a meaningful amount of stock. You must also resist the
temptation to stray from your guidelines: If you aren’t willing to own a
stock for ten years, don’t even think about owning it for ten minutes.
Put together a portfolio of companies whose aggregate earnings march
upward over the years, and so also will the portfolio’s market value.

1996 Chairman’s Letter