This quote essentially suggests that it requires a certain level of bravery to act immorally or wickedly, implying that those who are “good” are perhaps too scared to step out of their comfort zone of morality. Nietzsche is challenging the conventional idea that being good is a sign of strength, and being wicked is a sign of weakness or cowardice. Instead, he suggests that it might be the opposite: it takes courage to be wicked, and it is the good who are cowardly.

This can be interpreted in several ways. One way is to consider that indulging in wickedness often involves risk-taking and facing the potential consequences of one’s actions, which requires physical and moral courage. On the other hand, those who always do what’s right and good might be seen as playing it safe, avoiding risks and thus showing a form of cowardice.

Another interpretation is that Nietzsche is suggesting that those who are “good” are merely conforming to societal norms and expectations, which doesn’t require much courage. In contrast, those who are “wicked” are breaking these norms and thus demonstrating a form of courage.

In today’s world, this quote could be applied to the idea of challenging the status quo or standing up against societal norms. It takes courage to question established norms and values, to challenge authority, or to stand up for what one believes in, even if it’s unpopular or considered “wicked” by the majority.

In terms of personal development, this idea could be understood as an encouragement to be brave, to take risks, and to not be afraid of being perceived as “wicked” or “bad” by others. It’s a call to be true to oneself, even if it means going against the grain. However, it’s important to note that this doesn’t mean endorsing immoral or harmful actions, but rather encouraging independent thinking and courage in one’s convictions.