This quote suggests that the two extreme ends of the wealth spectrum – the very poor and the very rich – are the ones who are most concerned about money. The very poor worry about money because they lack it; they struggle to meet their basic needs such as food, shelter, and healthcare, and every penny counts. On the other hand, the very rich worry about money because they have too much of it. They worry about maintaining their wealth, investing it wisely, and the potential problems and responsibilities that come with having a lot of money.

The middle class or those who are neither very poor nor very rich, according to this quote, do not worry about money as much. They have enough to meet their needs and some of their wants, and while they may have financial concerns, they don’t carry the same level of worry as the two extremes. They are in a position where they can enjoy what they have without the constant fear of losing it or the anxiety of not having enough.

In today’s world, this quote could be seen as a commentary on income inequality. The gap between the rich and the poor continues to widen, and this disparity leads to increased worry and stress at both ends of the spectrum. For the poor, the worry is about survival, while for the rich, the worry is about preservation and growth of wealth.

In terms of personal development, this quote could serve as a reminder to strive for a balance in life. It suggests that having too little or too much money can lead to worry and stress, and that perhaps the goal should not be to become extremely wealthy, but to reach a level of financial stability where needs are met and there is enough left over for some wants. It could also be seen as a call to focus on non-material wealth, like relationships, experiences, and personal growth, which can bring happiness and satisfaction without the worry associated with financial wealth.