We can’t be aware of everything we have to deal with at the same time. We can’t even be fully aware of ourselves, and one or another part of us is always beyond such awareness, sometimes slipping out of control completely, and you’ll never know what wrong action, let alone word, can come about as a result.
I know one man who’d been in jail for fifteen years for a murder. From what I heard, he saw a stranger getting out of his car at a parking lot near the local liquor store, and all of a sudden something clicked in his head, so he came up to him and delivered a fatal blow to his face – for no reason at all. He’s completely normal, except for the fact that once some little gear jammed in his head for a while at one awfully wrong moment. The worst thing that I could think of every time I saw him, however, wasn’t that the same thing could happen to him again with me within his reach, but the thought that this can happen to anyone – without exception.
Now matter how clear and simple one’s behavior might seem, the underlying mind is always too complex for us trace, and there’s always enough uncertainty to bear a potential for catastrophe. As said above, we are not aware of ourselves, but if we are constantly aware of this, we will reduce the risk to minimum.