Vallejo, "Confianza en el anteojo, no en el ojo"

A poem ("Trust then the glasses, yet trust not the eye") by this Peruvian poet.  You can read the original in this collection.

Trust then the glasses, yet trust not the eye;
Trust but the stairway, never trust the stair;
Trust in the wing, not in the birds to fly,
And trust in you alone, in you alone.

Trust then in evils, not evildoers;
Trust but the cup, but never trust the wine;
Trust in the corpse, not in the man in time;
And trust in you alone, in you alone.

Trust then in many, never in the one;
Trust in the riverbed, never in the tide; 
Trust in the pants, not in the legs to run,
And trust in you alone, in you alone.

Trust in the window, but trust not the door;
Trust in the mother, not in months nine;
Trust destiny, and not the golden die,
And trust in you alone, in you alone.