"It is not because things are difficult that we do not dare; it is because we do not dare that things are difficult"
"A single lifetime, even though entirely devoted to the sky, would not be enough for the study of so vast a subject. A time will come when our descendants will be amazed that we did not know things that are so plain to them."
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Source: De Beneficiis. II. 1. As quoted in Hoyt's New Cyclopedia Of Practical Quotations, 1922.
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