Definition of the best-laid plans of mice and men gang aft agley in English:

the best-laid plans of mice and men gang aft agley

phrase

proverb
  • Even the most careful planning doesn't necessarily ensure success.

    ‘in the tradition of all best-laid plans, subsequent events overturned the scheme’
    • ‘There are philosophies and religions that deny that, but it seems to me that it is clear that the best-laid plans of mice and men gang aft agley, and not just because you slipped up in your litany of positive thoughts.’