This quote speaks to the idea that excellence cannot exist in isolation, particularly in an environment that doesn’t value or uphold standards. The “islands of excellence” are symbolic of pockets of high performance, quality, or achievement, while the “sea of slovenly indifference to standards” represents a larger context that is apathetic or neglectful towards maintaining standards of quality or performance.

In essence, the quote is suggesting that for excellence to be meaningful and sustainable, it needs to be supported by a broader culture of high standards. If the majority are indifferent to maintaining standards, the few instances of excellence will be overwhelmed and eventually eroded by the surrounding mediocrity.

In today’s world, this idea can be applied in various contexts. For instance, in a business, if only a few employees are performing at a high level while the majority are indifferent to the company’s standards, the business is likely to fail. The high performers cannot carry the entire company, and their efforts may be undermined by the low standards of the rest.

Similarly, in a society, if only a small proportion of citizens are responsible, law-abiding, and committed to the common good, while the majority are indifferent to societal norms and laws, the society will struggle to function effectively. The responsible citizens cannot compensate for the indifference of the majority.

In terms of personal development, this quote can be a reminder that in order to achieve excellence in any area of life, it’s important not just to strive for personal achievement, but also to cultivate an environment that supports and upholds high standards. This might mean surrounding oneself with people who are also striving for excellence, or advocating for high standards in one’s workplace, community, or society.