If there is a possibility of several things going wrong, the one that will cause the most damage will be the one that goes wrong. Nature always sides with the hidden flaw. It always costs more than first estimated. If you try to please everybody, somebody will be disappointed. It is easier to get involved in something than to get out of it.
Every solution breeds new problems.
Whenever you set out to do something, something else must be done first. If you perceive that there are four possible ways in which a procedure can go wrong and circumvent them, then a fifth way will promptly develop. If you're feeling good, don't worry, you'll get over it. It is impossible to make anything foolproof, because fools are so ingenious. If you tinker with anything long enough, it will break.