The bright, frosty day declined as they walked and spoke together. The sun dipped in the river far behind them, and the old city lay red before them, as their walk drew to a close. The moaning water cast its seaweed duskily at their feet, when they turned to leave its margin; and the rooks hovered above them with hoarse cries, darker splashes in the darkening air.
When I go into the garden with a spade and dig a bed I feel such an exhilaration and health that I discover that I have been defrauding myself all this time in letting others do for me what I should have done with my own hands.
Two things fill the mind with ever new and increasing admiration and awe, the oftener and more steadily we reflect on them: the starry heavens above me and the moral law within me.
Mathematics would certainly have not come into existence if one had known from the beginning that there was in nature no exactly straight line, no actual circle, no absolute magnitude.
All is going on as it was wont. The waves are hoarse with repetition of their mystery; the dust lies piled upon the shore; the sea-birds soar and hover; the winds and clouds go forth upon their trackless flight; the white arms beckon, in the moonlight, to the invisible country far away.
Science ... has no consideration for ultimate purposes, any more than Nature has, but just as the latter occasionally achieves things of the greatest suitableness without intending to do so, so also true science, as the imitator of nature in ideas, will occasionally and in many ways further the usefulness and welfare of man,-but also without intending to do so.
My scientific work is motivated by an irresistible longing to understand the secrets of nature and by no other feeling. My love for justice and striving to contribute towards the improvement of human conditions are quite independent from my scientific interests.
As Arkwright and Whitney were the demi-gods of cotton, so prolific Time will yet bring an inventor to every plant. There is not a property in nature but a mind is born to seek and find it.