"愚蠢的一致性是小心灵的妖魔。"

Simplified Meaning:

Sometimes, people stick too rigidly to their habits and ideas without thinking about whether they make sense or not. This quote means that it is unwise to always do things the same way just for the sake of consistency. It can be a sign of a small-minded person who is not open to new ways of thinking. For example, imagine a business is not doing well. A person with a "foolish consistency" might keep following the same unsuccessful plan because that's what they have always done. Instead of adapting or trying something new, they stick to old methods even if they don't work anymore. To apply this to your life, be open to change and willing to try new approaches. Don’t be afraid to question your habits and routines. If something isn't working, consider alternative solutions instead of repeating the same mistakes. This way, you can grow and improve rather than being stuck in the same spot.