"Having a lock on your heart or mind is kind of like having a lock on your front door. Sure you might keep out the dullest of the stock and the most basic of trespassers but the determined and cunning will still find a way in. Not to mention that foolishness can happen on both sides of the lock, seeing how easy it is to make the mistake of letting something wrong or bad inside your precious temple of heart and head. But with no lock at all? Sure you might run the risk of dealing with the dull and uninspired, the cooky and insane, the cruel and mean-spirited, but with experience those types can’t and won’t effect you, in fact they will enrich you."