Correspondence, by Benedict de Spinoza, [1883], at sacred-texts.com
[Oldenburg sends Boyle's book, and laments that Spinoza has not been able to answer all his doubts.]
Most respected Friend, Please accept herewith the book I promised you, and write me in answer your opinion on it, especially on the remarks about nitre, and about fluidity, and solidity. I owe you the warmest thanks for your learned second letter, which I received to-day, but I greatly grieve that your journey to Amsterdam prevented you from answering all my doubts. I beg you will supply the omission, as soon as you have leisure. You have much enlightened me in your last letter, but have not yet dispelled all my darkness; this result will, I believe, be happily accomplished, when you send me clear and distinct information concerning the first origin of things. Hitherto I have been somewhat in doubt as to the cause from which, and the manner in which things took their origin; also, as to what is the nature of their connection with the first cause, if such there be. All that I hear or read on the subject seems inconclusive. Do you then, my very learned master, act, as it were, as my torch-bearer in the matter. You will have no reason to doubt my confidence and gratitude. Such is the earnest petition of
Yours most faithfully,
HENRY OLDENBURG.