“But I am leaving the regions of fact, which are difficult to penetrate, but which bring in their train rich rewards, and entering the regions of speculation, where many roads lie open, but where a few lead to a definite goal.”
Speculating on the nature of radioactive emanations, in his Nobel lecture http://nobelprize.org/nobel_prizes/chemistry/laureates/1904/ramsay-lecture.html, December 12, 1904.
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William Ramsay 1
Scottish chemist (1852–1916) 1852–1916Related quotes

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 274.

Sādhanā : The Realisation of Life http://www.spiritualbee.com/spiritual-book-by-tagore/ (1916)
Context: Though the West has accepted as its teacher him who boldly proclaimed his oneness with his Father, and who exhorted his followers to be perfect as God, it has never been reconciled to this idea of our unity with the infinite being. It condemns, as a piece of blasphemy, any implication of man's becoming God. This is certainly not the idea that Christ preached, nor perhaps the idea of the Christian mystics, but this seems to be the idea that has become popular in the Christian west.
But the highest wisdom in the East holds that it is not the function of our soul to gain God, to utilise him for any special material purpose. All that we can ever aspire to is to become more and more one with God. In the region of nature, which is the region of diversity, we grow by acquisition; in the spiritual world, which is the region of unity, we grow by losing ourselves, by uniting. Gaining a thing, as we have said, is by its nature partial, it is limited only to a particular want; but being is complete, it belongs to our wholeness, it springs not from any necessity but from our affinity with the infinite, which is the principle of perfection that we have in our soul.

“…the regions where there is only life, and therefore all that is not music is silence.”
The Hands of the Father
Unspoken Sermons, First Series (1867)

“The greatest forces lie in the region of the uncomprehended.”
The Fantastic Imagination (1893)
Context: A fairytale, a sonata, a gathering storm, a limitless night, seizes you and sweeps you away: do you begin at once to wrestle with it and ask whence its power over you, whither it is carrying you? The law of each is in the mind of its composer; that law makes one man feel this way, another man feel that way. To one the sonata is a world of odour and beauty, to another of soothing only and sweetness. To one, the cloudy rendezvous is a wild dance, with a terror at its heart; to another, a majestic march of heavenly hosts, with Truth in their centre pointing their course, but as yet restraining her voice. The greatest forces lie in the region of the uncomprehended.
I will go farther. The best thing you can do for your fellow, next to rousing his conscience, is — not to give him things to think about, but to wake things up that are in him; or say, to make him think things for himself. The best Nature does for us is to work in us such moods in which thoughts of high import arise. Does any aspect of Nature wake but one thought? Does she ever suggest only one definite thing? Does she make any two men in the same place at the same moment think the same thing? Is she therefore a failure, because she is not definite? Is it nothing that she rouses the something deeper than the understanding — the power that underlies thoughts? Does she not set feeling, and so thinking at work? Would it be better that she did this after one fashion and not after many fashions? Nature is mood-engendering, thought-provoking: such ought the sonata, such ought the fairytale to be.

The American Mercury (May 1926)
1920s
Context: It is the natural tendency of the ignorant to believe what is not true. In order to overcome that tendency it is not sufficient to exhibit the true; it is also necessary to expose and denounce the false. To admit that the false has any standing in court, that it ought to be handled gently because millions of morons cherish it and thousands of quacks make their livings propagating it—to admit this, as the more fatuous of the reconcilers of science and religion inevitably do, is to abandon a just cause to its enemies, cravenly and without excuse. It is, of course, quite true that there is a region in which science and religion do not conflict. That is the region of the unknowable.

" Q&A Interview: Her Highness Sheikha Moza bint Nasser Launches Global Education Initiative" http://www.forbes.com/sites/skollworldforum/2012/11/14/qa-interview-her-highness-sheikha-moza-bint-nasser-launches-global-education-initiative/, Forbes for Skoll World Forum, November 14 2012