No society can make a perpetual constitution… The earth belongs always to the living generation.

This quote encapsulates the idea that no set of laws or constitution can be eternally binding or unchangeable. It suggests that each generation should have the right and freedom to govern themselves according to their contemporary needs, values, and circumstances. The earth always belongs to those who are living in the present moment, implying that they should have the authority to shape their own world.

The phrase “perpetual constitution” refers not only to a nation’s legal framework but also any rigid system or set of rules that outlive their relevance. Jefferson argues against clinging onto outdated systems simply because they were established in the past.

Applying this concept today, it challenges us as a society to continually reassess our laws and societal norms as our world evolves. For instance, many countries have revised their laws on same-sex marriage as societal attitudes towards homosexuality changed over time.

In terms of personal development, it encourages us not to be bound by old habits or ways of thinking just because they’ve been with us for a long time. We should feel empowered to change our personal ‘constitution’ – our beliefs, values and behaviors – when they no longer serve us well in our current circumstances.

Moreover, it emphasizes living in the present and taking responsibility for shaping your own life rather than blaming past generations or circumstances for your current situation. Just like how each generation has ownership over its time on earth, each individual owns his/her life journey too.