For the first time in the history of mankind, one generation literally has the power to destroy the past, the present and the future, the power to bring time to an end. ↗
The only medicine for suffering, crime, and all other woes of mankind, is wisdom. Teach a man to read and write, and you have put into his hands the great keys of the wisdom box. But it is quite another thing to open the box. ↗
I take it that the good of mankind means the attainment, by every man, of all the happiness which he can enjoy without diminishing the happiness of his fellow men. ↗
To show the world what long experience gains, requires not courage, though it calls for pains; but at life's outset to inform mankind is a bold effort of a valiant mind. ↗
The best security for civilization is the dwelling, and upon properly appointed and becoming dwellings depends, more than anything else, the improvement of mankind. ↗