Be indifferent if you lose your short term clients, remember they are your own worst enemy

We buy expecting to hold a bond to maturity and a stock forever.

Short-term performance envy causes many of the shortcomings that lock most investors into a perpetual cycle of underachievement. Watch your competitors not out of jealousy but out of respect and focus your efforts not on replicating others' portfolios but on looking for opportunities where they are not. The only way for investors to significantly outperform is to periodically stand far apart from the crowd, something few are willing, or able, to do.

Costs and liabilities are rarely overstated.

The government can indefinitely control both short-term and long-term interest rates.

To achieve long-term success over many financial market and economic cycles, observing a few rules is not enough. Too many things change too quickly in the investment world for that approach to succeed. It is necessary instead to understand the rationale behind the rules in order to appreciate why they work when they do and don't when they don't.

Warren Buffett once wrote that value investing is like an inoculation--it either takes or it doesn't--and when you explain to somebody what it is and how it works and why it works and show them the returns, either they get it or they don't.