This quote is suggesting that true, enduring happiness can only be achieved when we live in accordance with our highest ideals, values, and principles. These ideals could include honesty, integrity, kindness, compassion, or any other value that an individual holds dear. Living by these ideals means making decisions and taking actions that are in line with these values, even when it is difficult or inconvenient to do so.

The concept of ‘highest ideals’ is subjective and varies from person to person. For some, it could be achieving professional success, while for others, it could be living a life of service to others. The key is to identify what these ideals are for you personally and then strive to live by them.

Applying this idea in today’s world or in personal development involves a process of self-discovery and self-improvement. It starts with identifying your highest ideals, which requires introspection and self-awareness. Once these ideals are identified, you must then align your actions and decisions with these values. This could mean making changes in your life, such as leaving a job that does not align with your values, ending toxic relationships, or starting to volunteer for a cause that you believe in.

In personal development, this idea can be used to guide your growth and progress. By setting goals that are in line with your highest ideals, you will be more motivated to achieve them and more satisfied when you do. For example, if one of your highest ideals is physical health, setting a goal to run a marathon and working towards it would bring long-term happiness.

In today’s world, where there are often pressures to conform to societal norms or to prioritize material success over personal values, living by your highest ideals can sometimes be challenging. However, this quote suggests that it is the key to long-term happiness. Even if it is difficult in the short term, in the long run, living by your highest ideals will bring a deeper sense of satisfaction and fulfillment.