Foolproof systems to not take into account the ingenuity of fools.
The toughest thing about raising kids is convincing them that you have seniority.
The bridges that you cross before you come to them are over rivers that aren't there.
The annoying thing about being modest is that you can't brag about it.
The key to getting ahead is setting aside 8 hours a day for work and 8 hours a day for sleep - and making sure they're not the same hours.
The trouble with making intelligent suggestions is that you're apt to be appointed to carry them out.