This quote humorously suggests that when people start complimenting you on your youthful appearance, it’s likely because you’ve reached an age where looking young is no longer expected, hence you’re getting old. It implies that flattery about one’s youthful looks is often a polite way of avoiding the subject of their actual age.

In terms of depth, this quote touches upon the societal norms and expectations related to aging. It reflects the discomfort or denial society often has towards aging and how it’s masked with flattery. It also subtly hints at the human tendency to avoid uncomfortable truths, in this case, the inevitability of aging.

Applying this to today’s world, it’s clear that society’s obsession with youth and beauty remains prevalent. In the era of social media and selfies, looking young is often equated with attractiveness and success. This quote can serve as a reminder not to get swept up in the superficiality of appearances and societal expectations.

In terms of personal development, this quote encourages acceptance and understanding of the natural aging process. Instead of fearing or denying aging, it’s healthier to embrace it as a part of life’s journey. It’s a call to focus on inner growth and wisdom which comes with age, rather than just the outward appearance. This quote can inspire individuals to value authenticity and truth over socially constructed norms and to appreciate the beauty in all stages of life.