I sought much, and wasted my time on nothing.
Multa quæsivi, frustra tempus consumpsi.

Philosophers
Hugo Grotius
Dutch jurist (1583-1645), father of international law. His De Jure Belli ac Pacis (1625) grounded the law of war and peace in natural law. Sentenced to life imprisonment in 1619, he escaped in a book chest.
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Source: Last words attributed (1645), RostockUnverified