“And now that I have allowed myself the jest to which in this two-sided life hardly any page can be too serious to grant a place, I part with the book with deep seriousness, in the sure hope that sooner or later it will reach those to whom alone it can be addressed; and for the rest, patiently resigned that the same fate should, in full measure, befall it, that in all ages has, to some extent, befallen all knowledge, and especially the weightiest knowledge of the truth, to which only a brief triumph is allotted between the two long periods in which it is condemned as paradoxical or disparaged as trivial. The former fate is also wont to befall its author. But life is short, and truth works far and lives long: let us speak the truth.”

"A Man of the People", p. 140
Four Ways to Forgiveness (1995)
Context: “Lines and colors made with earth on earth may hold knowledge in them. All knowledge is local, all truth is partial,” Havzhiva said with an easy, colloquial dignity that he knew was an imitation of his mother, the Heir of the Sun, talking to foreign merchants. “No truth can make another truth untrue. All knowledge is a part of the whole knowledge. A true line, a true color. Once you have seen the larger patttern, you cannot go back to seeing the part as the whole."

Memoirs of a Revolutionist (1899) http://dwardmac.pitzer.edu/anarchist_archives/kropotkin/memoirs/memoirstoc.html Part IV, Sect. 3 http://dwardmac.pitzer.edu/anarchist_archives/kropotkin/memoirs/memoirs4_3.html
Context: Belief in an ice-cap reaching Middle Europe was at that time rank heresy; but before my eyes a grand picture was rising, and I wanted to draw it, with the thousands of details I saw in it; to use it as a key to the present distribution of floras and faunas; to open new horizons for geology and physical geography.
But what right had I to these highest joys, when all around me was nothing but misery and struggle for a mouldy bit of bread; when whatsoever I should spend to enable me to live in that world of higher emotions must needs be taken from the very mouths of those who grew the wheat and had not bread enough for their children? From somebody's mouth it must be taken, because the aggregate production of mankind remains still so low.
Knowledge is an immense power. Man must know. But we already know much! What if that knowledge — and only that — should become the possession of all? Would not science itself progress in leaps, and cause mankind to make strides in production, invention, and social creation, of which we are hardly in a condition now to measure the speed?

Source: Sayings of Sri Ramakrishna (1960), p. 138

Recreation (1919)
Context: I am not attempting here a full appreciation of Colonel Roosevelt. He will be known for all time as one of the great men of America. I am only giving you this personal recollection as a little contribution to his memory, as one that I can make from personal knowledge and which is now known only to myself. His conversation about birds was made interesting by quotations from poets. He talked also about politics, and in the whole of his conversation about them there was nothing but the motive of public spirit and patriotism. I saw enough of him to know that to be with him was to be stimulated in the best sense of the word for the work of life. Perhaps it is not yet realised how great he was in the matter of knowledge as well as in action. Everybody knows that he was a great man of action in the fullest sense of the word. The Press has always proclaimed that. It is less often that a tribute is paid to him as a man of knowledge as well as a man of action. Two of your greatest experts in natural history told me the other day that Colonel Roosevelt could, in that department of knowledge, hold his own with experts. His knowledge of literature was also very great, and it was knowledge of the best. It is seldom that you find so great a man of action who was also a man of such wide and accurate knowledge. I happened to be impressed by his knowledge of natural history and literature and to have had first-hand evidence of both, but I gather from others that there were other fields of knowledge in which he was also remarkable.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 37.

Sādhanā : The Realisation of Life http://www.spiritualbee.com/spiritual-book-by-tagore/ (1916)

Source: 1960s, Beyond Economics: Essays on Society, 1968, p. 142

Cheers.
Speech in Rawtenstall (8 July 1886), quoted in The Times (9 July 1886), p. 6
1880s