Here are some quotes related to existence along with the authors’ names:

“The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.” – Albert Camus

“All religions, arts and sciences are branches of the same tree. All these aspirations are directed toward ennobling man’s life, lifting it from the sphere of mere physical existence and leading the individual towards freedom.” – Albert Einstein

“Maybe this world is another planet’s hell.” – Aldous Huxley

“The part of life we really live is small. For all the rest of existence is not life, but merely time.” – Seneca

“I was not, I was, I am not, I care not.” – Epicurus

“The artist, like the God of the creation, remains within or behind or beyond or above his handiwork, invisible, refined out of existence, indifferent, paring his fingernails.” – James Joyce

“The state comes into existence for the sake of life and continues to exist for the sake of good life.” – Aristotle

“In the wild struggle for existence, we want to have something that endures, and so we fill our minds with rubbish and facts, in the silly hope of keeping our place.” – Oscar Wilde

“The proper function of man is to live, not to exist. I shall not waste my days in trying to prolong them. I shall use my time.” – Jack London

“In the social jungle of human existence, there is no feeling of being alive without a sense of identity.” – Erik Erikson

“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.” – Edgar Allen Poe

“Law rules throughout existence, a Law which is not intelligent, but Intelligence.” – Ralph Waldo Emerson

“You are an explorer, and you represent our species, and the greatest good you can do is to bring back a new idea, because our world is endangered by the absence of good ideas. Our world is in crisis because of the absence of consciousness.” – Terence McKenna

“Space and silence are two aspects of the same thing. The same no-thing. They are externalization of inner space and inner silence, which is stillness: the infinitely creative womb of all existence.” – Eckhart Tolle

“When we are unhurried and wise, we perceive that only great and worthy things have any permanent and absolute existence, that petty fears and petty pleasures are but the shadow of the reality.” – Henry David Thoreau

“Man is the only animal for whom his own existence is a problem which he has to solve.” – Erich Fromm

“The whole secret of existence is to have no fear.” – Gautama Buddha

“Imagination is the only key to the future. Without it none exists – with it all things are possible.” – Ida Tarbell

“The very existence of flamethrowers proves that sometime, somewhere, someone said to themselves, ‘You know, I want to set those people over there on fire, but I’m just not close enough to get the job done’.” – George Carlin

“There is a point where in the mystery of existence contradictions meet; where movement is not all movement and stillness is not all stillness; where the idea and the form, the within and the without, are united; where infinite becomes finite, yet not losing its infinity.” – Rabindranath Tagore