Humans have engaged with the concept of beauty for millennia, trying to define it while being defined by it.

Plato thought that merely contemplating beauty caused “the soul to grow wings.” Ralph Waldo Emerson found beauty in Raphael’s “The Transfiguration,” writing that “a calm benignant beauty shines over all this picture, and goes directly to the heart.” In “My Skin,” Lizzo sings: “The most beautiful thing that you ever seen is even bigger than what we think it means.”

We asked a group of artists, scientists, writers and thinkers to answer this simple question: Why is beauty, however defined, so important in our lives? Here are their responses.

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We’ll do anything to watch a sunset on a clear summer day at the beach. We’ll stand and stare and remain silent, as suffused shades of orange stretch over the horizon. Meanwhile, the sun, like a painter who keeps changing his mind about which colors to use, finally resolves everything with shades of pink and light yellow, before sinking, finally, into stunning whiteness.

Suddenly, we are marveled and uplifted, pulled out of our small, ordinary lives and taken to a realm far richer and more eloquent than anything we know.

Call it enchantment, the difference between the time-bound and the timeless, between us and the otherworldly. All beauty and art evoke harmonies that transport us to a place where, for only seconds, time stops and we are one with the world. It is the best life has to offer.

Under the spell of beauty, we experience a rare condition called plenitude, where we want for nothing. It isn’t just a feeling. Or if it is, then it’s a feeling like love — yes, exactly like love. Love, after all, is the most intimate thing we know. And feeling one with someone or something isn’t just an unrivaled condition, but one we do not want to live without.

We fall in love with sunsets and beaches, with tennis, with works of art, with places like Tuscany and the Rockies and the south of France, and, of course, with other people — not just because of who or what they are, but because they promise to realign us with our better selves, with the people we’ve always known we were but neglected to become, the people we crave to be before our time runs out.

André Aciman is the author of “Call Me by Your Name” and “Find Me.”

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The marketing machines of modern life would have us believe that beauty is about physical attributes. With the benefit of the wisdom we have attained after many years spent traversing the planet as conservation photographers, we know otherwise.

Beauty has less to do with the material things around us, and more to do with how we spend our time on earth. We create true beauty only when we channel our energy to achieve a higher purpose, build strong communities and model our behavior so that others can find inspiration to do better by each other and our planet. Beauty has nothing to do with the latest makeup or fashion trends, and everything to do with how we live on this planet and act to protect it.

Every day we learn that species, landscapes and indigenous knowledge are vanishing before our eyes. That’s why we’ve dedicated our lives to reminding the world of the fragile beauty of our only home, and to protecting nature, not just for humanity’s sake, but for the benefit of all life on earth.

Committing our time, energy and resources to achieve these goals fills our lives with beauty.