Try to remember this: what you project Is what you will...

Try to remember this: what you project Is what you will perceive; what you perceive With any passion, be it love or terror, May take on whims and powers of its own. Therefore a numb and grudging circumspection Will serve you best - unless you overdo it, Watching your step too narrowly, refusing To specify a world, shrinking your purview To a tight vision of your inching shoes, Which may, as soon as you come to think, be crossing An unseen gorge upon a rotten trestle.