What is a classic saying about the feeling of work?

1, work is everything in life, and people must work in order to survive. -Marx 2. People only have one life, but the opportunities for work are infinite. Lenin 3. Work is the cornerstone of human existence. -Gorky 4. Life is work, and we must work hard. -lev tolstoy 5. The value of life is measured by what people are doing now. -Xu Wei 6. Work is the only source of life value. Einstein 7. Man's bounden duty lies in the courage to explore the truth. -Copernicus 8. The best things in life are the results of what we strive for. Einstein 9. Work is the value of life. Russell