Ideas can only be useful if they come to life in the minds of many people.
Alexander von Humboldt – German scientist (1769-1859), in a letter to Ludwig Bollmann (Cumaná, Venezuela, October 15th, 1799), Quotations book 2025
Ideas can only be useful if they come to life in the minds of many people.
Alexander von Humboldt – German scientist (1769-1859), in a letter to Ludwig Bollmann (Cumaná, Venezuela, October 15th, 1799), Quotations book 2025