“how should tasting touching hearing seeing
breathing any — lifted from the no
of all nothing — human merely being
doubt unimaginable You?”

The Tragic Sense of Life (1913), II : The Starting-Point
Context: Knowledge is employed in the service of the necessity of life and primarily in the service of the instinct of personal preservation. The necessity and this instinct have created in man the organs of knowledge and given them such capacity as they possess. Man sees, hears, touches, tastes and smells that which it is necessary for him to see, hear, touch, taste and smell in order to preserve his life. The decay or loss of any of these senses increases the risks with which his life is environed, and if it increases them less in the state of society in which we are actually living, the reason is that some see, hear, touch, taste and smell for others. A blind man, by himself and without a guide, could not live long. Society is an additional sense; it is the true common sense.

God doesn't believe in atheists (2002)

The Saviors of God (1923)
Context: With clarity and quiet, I look upon the world and say: All that I see, hear, taste, smell, and touch are the creations of my mind.
The sun comes up and the sun goes down in my skull. Out of one of my temples the sun rises, and into the other the sun sets.
The stars shine in my brain; ideas, men, animals browse in my temporal head; songs and weeping fill the twisted shells of my ears and storm the air for a moment.

Some final, unfinished thoughts a few weeks before his death aged forty-six, in 1637, Essay on Nicholas Ferrar, Jane Falloon, Heart of Pilgrimage-A Study of George Hertbert, Author House,Milton Keynes 2007 ISBN 978-1-4259-7755-9

Source: His Dark Materials, The Amber Spyglass (2000), Ch. 23 : No Way Out

Oliver Wendell Holmes, Sr., in his valedictory address to medical graduates at Harvard University (10 March 1858), published in The Boston Medical and Surgical Journal Vol. LVIII, No. 8 (25 March 1858), p. 158; this has also been paraphrased "Beware how you take away hope from another human being".
Misattributed

Valedictory Address to medical graduates at Harvard University (10 March 1858), published in The Boston Medical and Surgical Journal Vol. LVIII, No. 8 (25 March 1858), p. 158; this has also been paraphrased "Beware how you take away hope from another human being".
Misattributed
Context: You can never be too cautious in your prognosis, in the view of the great uncertainty of the course of any disease not long watched, and the many unexpected turns it may take.
I think I am not the first to utter the following caution : —
Beware how you take away hope from any human being. Nothing is clearer than that the merciful Creator intends to blind most people as they pass down into the dark valley. Without very good reasons, temporal or spiritual, we should not interfere with his kind arrangements. It is the height of cruelty and the extreme of impertinence to tell your patient he must die, except you are sure that he wishes to know it, or that there is some particular cause for his knowing it. I should be especially unwilling to tell a child that it could not recover; if the theologians think it necessary, let them take the responsibility. God leads it by the hand to the edge of the precipice in happy unconsciousness, and I would not open its eyes to what he wisely conceals.

Source: The Cardturner: A Novel about a King, a Queen, and a Joker