As for the forces electromagnetism and gravity we experience in everyday life. But the weak and strong forces are beyond our ordinary experience. So in physics lots of the basic building blocks take 20th- or perhaps 21st-century equipment to explore.

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The man who makes everything that leads to happiness depends upon himself and not upon other men has adopted the very best plan for living happily. This is the man of moderation the man of manly character and of wisdom.