If you see that there are four possible ways in which a procedure can go wrong, and circumvent these, then a fifth way, unprepared for, promptly develops.
If you stand in one place long enough, you make a line.
If you step out of a short line for a second, it becomes a long line.
If you think that OSHA is a small town in Wisconsin, you're in trouble.
If you think the problem is bad now, just wait until we've solved it.
If you throw something away, you will need it the next day.
If you try to please everybody, nobody will like it.
If you understand it, it is obsolete.
If you want to be well liked, never lie about yourself, and be careful when telling the truth about others.
It works better if you plug it in.