I was taught that the way of progress was neither swift nor easy.

Scientists
Marie Curie
Polish-born physicist and chemist who won Nobel Prizes in Physics (1903) and Chemistry (1911). She discovered radium and polonium and pioneered the study of radioactivity.
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Marie Curie's Other Quotes
Related Quotes
Endure and renounce.
-- Epictetus
Fire tests gold; adversity tests strong people.
-- Seneca
If you accomplish something good with hard work, the labour passes quickly, but the good endures; if you do something shameful in pursuit of pleasure, the pleasure passes quickly, but the shame endures.
-- Gaius Musonius Rufus
Bodily pain does not last without limit; intense pain is brief in duration.
-- Epicurus
If you carve without ceasing, even metal and stone can be engraved.
-- Xunzi
He who has a why to live can bear almost any how.
-- Friedrich Nietzsche