best-laid plans go astray, the

Also, the best-laid schemes go astray. Even very careful designs or projects do not always succeed. For example, Mary spent all afternoon preparing this elaborate dish but forgot the most important ingredient-oh well, the best-laid plans go astray . This particular turn of phrase comes from Robert Burns's poem "To a Mouse" (1786): "The best-laid schemes o' mice an' men gang aft a-gley [go often astray]." It is so well known that it is often abbreviated to the best-laid plans.