This quote suggests that a person who is completely contented is a failure because they lack ambition, drive, and the desire to improve or achieve more. According to this perspective, contentment equates to complacency or stagnation. It implies that success is not just about achieving a state of satisfaction, but about continually striving for more, pushing boundaries, and challenging oneself.

The idea behind this quote is that the pursuit of excellence, learning, and growth never ends. It’s about the journey, not the destination. Once you think you have reached your destination, you stop pushing yourself, stop innovating, and stop growing. That’s when you become a ‘failure’ as per Edison’s definition.

In terms of personal development, this quote could be interpreted as a call to always strive for self-improvement, to never stop learning, and to never be fully satisfied with one’s current state. It encourages us to always question, always seek answers, and always push ourselves to be better.

In today’s world, this quote is highly relevant. In an era where change is the only constant, and where technological advances are happening at an unprecedented rate, complacency can lead to obsolescence. Whether it’s in terms of personal skills or business strategies, those who rest on their laurels risk being left behind.

However, it’s also important to balance this constant striving with a sense of gratitude and satisfaction for what one has already achieved. While it’s beneficial to always aim for improvement and growth, it’s equally important to appreciate and value the present moment and the progress made so far.

Overall, this quote is a reminder that success is a journey, not a destination. It’s about constantly pushing ourselves, learning, growing, and striving to be better, while also appreciating the journey and the progress made along the way.