Mention453439
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| so:text | The test of all beliefs is their practical effect in life. If it be true that optimism compels the world forward, and pessimism retards it, then it is dangerous to propagate a pessimistic philosophy. (en) |
| so:isPartOf | https://en.wikiquote.org/wiki/Helen_Keller |
| so:description | Optimism (1903) (en) |
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Triples where Mention453439 is the object (without rdf:type)
| qkg:Quotation429594 | qkg:hasMention |
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