“Civilisation knows how to use such powers as it has, while the immense potentiality of the unlicensed is dissipated in vapour.”

Reported in Louis Klopsch, ed., Many Thoughts of Many Minds: A Treasury of Quotations From the Literature of Every Land and Every Age (1896), p. 229.

The Eagle's Gift, (1981)

Surviving the Future, (2016), p. 180, Epilogue http://www.flemingpolicycentre.org.uk/lean-logic-surviving-the-future/

The Nemesis of Faith (1849)

"The Ballad of Sacco and Vanzetti, Part Two"
Sacco e Vanzetti (1971)

1910s, "The Foreign Policy of the Russian Revolution"

The Art of Peace (1992)

The Doll

Sādhanā : The Realisation of Life http://www.spiritualbee.com/spiritual-book-by-tagore/ (1916)
Context: We never can have a true view of man unless we have a love for him. Civilisation must be judged and prized, not by the amount of power it has developed, but by how much it has evolved and given expression to, by its laws and institutions, the love of humanity. The first question and the last which it has to answer is, Whether and how far it recognises man more as a spirit than a machine? Whenever some ancient civilisation fell into decay and died, it was owing to causes which produced callousness of heart and led to the cheapening of man's worth; when either the state or some powerful group of men began to look upon the people as a mere instrument of their power; when, by compelling weaker races to slavery and trying to keep them down by every means, man struck at the foundation of his greatness, his own love of freedom and fair-play. Civilisation can never sustain itself upon cannibalism of any form. For that by which alone man is true can only be nourished by love and justice.