Always be on guard for deceit that can come from within you own heart to eat at your battered soul before you even know the reason why. Know that the interpretation of words is fickle and almost never correct. Know it is always safer to ask a question than to assume the worst, and by its guidance cast away something so good like just anoter piece of smelly garbage.
Always be on guard for the foul mood that casts the shadow over everything you do; it has no real power, but it lingers at the edge of your thoughts, and your hold over it is always tenuous, at best. It can blacken and make foreign, pointless, and evil everything you do; it can cast a shadow over you and refuse to let you see life's greatest integral parts, even when they're staring you in the face.
On other words, be on guard against yourself.
For you love to see yourself cry.