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The greatest day in your life and mine is when we take total responsibility for our attitudes. That's the day we truly grow up.

John C. Maxwell
American author, speaker and pastor

John Calvin Maxwell is an American author, speaker, and pastor who has written many books, primarily focusing on leadership. Titles include The 21 Irrefutable Laws of Leadership and The 21 Indispensable Qualities of a Leader. His books have sold millions of copies, with some on the New York Times Best Seller List.
Reference: Wikipedia

A man's life may stagnate as literally as water may stagnate, and just as motion and direction are the remedy for one, so purpose and activity are the remedy for the other.

John Burroughs
American naturalist and essayist (1837-1921)

John Burroughs was an American naturalist and nature essayist, active in the conservation movement in the United States. The first of his essay collections was Wake-Robin in 1871.
Reference: Wikipedia

I see on a immense scale, and as clearly as in a demonstration in a laboratory, that good comes out of evil; that the impartiality of the Nature Providence is best; that we are made strong by what we overcome; that man is man because he is as free to do evil as to do good; that life is as free to develop hostile forms as to develop friendly; that power waits upon him who earns it; that disease, wars, the unloosened, devastating elemental forces have each and all played their part in developing and hardening man and giving him the heroic fiber.

John Burroughs
American naturalist and essayist (1837-1921)

John Burroughs was an American naturalist and nature essayist, active in the conservation movement in the United States. The first of his essay collections was Wake-Robin in 1871.
Reference: Wikipedia

There can be no peace in the world so long as a large proportion of the population lack the necessities of life and believe that a change of the political and economic system will make them available. World peace must be based on world plenty.

John Boyd Orr
Scottish nutritionist, Director-General of the United Nations Food and Agriculture Organization (1880-1971)

John Boyd Orr, 1st Baron Boyd-Orr,, styled Sir John Boyd Orr from 1935 to 1949, was a Scottish teacher, medical doctor, biologist, nutritional physiologist, politician, businessman and farmer who was awarded the Nobel Peace Prize for his scientific research into nutrition and his work as the first Director-General of the United Nations Food and Agriculture Organization (FAO).
Reference: Wikipedia

Just as the Security Council was largely irrelevant to the great struggle of the last half of the twentieth century - freedom against Communism - so too it is largely on the sidelines in our contemporary struggles against international terrorism and the proliferation of weapons of mass destruction.

John Bolton
American lawyer and diplomat

John Robert Bolton is an American attorney, diplomat, Republican consultant, and political commentator. He served as the 25th United States Ambassador to the United Nations from 2005 to 2006, and as the 26th United States National Security Advisor from 2018 to 2019.
Reference: Wikipedia

That we find a crystal or a poppy beautiful means that we are less alone, that we are more deeply inserted into existence than the course of a single life would lead us to believe.

John Berger
British painter, writer and art critic (1926-2017)

John Peter Berger was an English art critic, novelist, painter and poet. His novel G. won the 1972 Booker Prize, and his essay on art criticism Ways of Seeing, written as an accompaniment to the BBC series of the same name, was influential. He lived in France for over fifty years.
Reference: Wikipedia

This is the highest wisdom that I own freedom and life are earned by those alone who conquer them each day anew.

Johann Wolfgang von Goethe
German writer, artist, natural scientist and politician (1749–1832)

Johann Wolfgang von Goethe was a German poet, playwright, novelist, scientist, statesman, theatre director, and critic. His works include plays, poetry, literature, and aesthetic criticism as well as treatises on botany, anatomy, and colour. He is widely regarded as the greatest and most influential writer in the German language, his work having a profound and wide-ranging influence on Western literary, political and philosophical thought from the late 18th century to the present day.
Reference: Wikipedia

Life belongs to the living, and he who lives must be prepared for changes.

Johann Wolfgang von Goethe
German writer, artist, natural scientist and politician (1749–1832)

Johann Wolfgang von Goethe was a German poet, playwright, novelist, scientist, statesman, theatre director, and critic. His works include plays, poetry, literature, and aesthetic criticism as well as treatises on botany, anatomy, and colour. He is widely regarded as the greatest and most influential writer in the German language, his work having a profound and wide-ranging influence on Western literary, political and philosophical thought from the late 18th century to the present day.
Reference: Wikipedia

A useless life is an early death.

Johann Wolfgang von Goethe
German writer, artist, natural scientist and politician (1749–1832)

Johann Wolfgang von Goethe was a German poet, playwright, novelist, scientist, statesman, theatre director, and critic. His works include plays, poetry, literature, and aesthetic criticism as well as treatises on botany, anatomy, and colour. He is widely regarded as the greatest and most influential writer in the German language, his work having a profound and wide-ranging influence on Western literary, political and philosophical thought from the late 18th century to the present day.
Reference: Wikipedia

An unused life is an early death.

Johann Wolfgang von Goethe
German writer, artist, natural scientist and politician (1749–1832)

Johann Wolfgang von Goethe was a German poet, playwright, novelist, scientist, statesman, theatre director, and critic. His works include plays, poetry, literature, and aesthetic criticism as well as treatises on botany, anatomy, and colour. He is widely regarded as the greatest and most influential writer in the German language, his work having a profound and wide-ranging influence on Western literary, political and philosophical thought from the late 18th century to the present day.
Reference: Wikipedia