“And should we not be guilty of consummate folly if we were to reject advantages which we cannot obtain otherwise, merely because they involve a greater gain to others than to ourselves?”

The Education of Women (1719)

"Markings", p. 438
Forewords and Afterwords (1973)

Book XXIV, line 7
Translations, Orlando Furioso of Ludovico Ariosto (1773)

Source: The Way of Kings

http://www.haaretz.com/print-edition/opinion/muslims-also-deserve-respect-1.180300.

Sect. V : An Enquiry into the Duty of Christians in general, and what Means ought to be used, in order to promote this Work.
An Enquiry into the Obligations of Christians (1792)
Context: Many can do nothing but pray, and prayer is perhaps the only thing in which Christians of all denominations can cordially, and unreservedly unite; but in this we may all be one, and in this the strictest unanimity ought to prevail. Were the whole body thus animated by one soul, with what pleasure would Christians attend on all the duties of religion, and with what delight would their ministers attend on all the business of their calling.
We must not be contented however with praying, without exerting ourselves in the use of means for the obtaining of those things we pray for. Were the children of light, but as wise in their generation as the children of this world, they would stretch every nerve to gain so glorious a prize, nor ever imagine that it was to be obtained in any other way.

Source: Esoterism as Principle and as Way

Existentialism and Human Emotions (1957)