Source: A Writer's Notebook (1946), p. 38. Maugham says something similar in The Summing up, Ch 22: "Love was only the dirty trick nature played on us to achieve the continuation of the species"

“He loved her so passionately he wanted her to be one soul and one body with him; and he was conscious that here, with those deep roots attaching her to the native life, she would always keep something from him.”

W. Somerset Maugham

"The pool", p. 123
Short Stories, Collected short stories 1

“It was not till quite late in life that I discovered how easy it is to say: "I don't know."”

W. Somerset Maugham

Source: A Writer's Notebook (1946), p. 258

“What has influenced my life more than any other single thing has been my stammer. Had I not stammered I would probably… have gone to Cambridge as my brothers did, perhaps have become a don and every now and then published a dreary book about French literature.”

W. Somerset Maugham

Newsweek, 23 May, 1960

“By the time I was twenty-four I had constructed a complete system of philosophy. It rested on two principles: The Relativity of Things and The Circumferentiality of Man. I have since discovered that the first was not a very original discovery. It may be that the other was profound, but though I have racked my brains I cannot for the life of me remember what it was.”

W. Somerset Maugham book The Summing Up

section 66
The Summing Up (1938)

“I reflected, while I chatted with the woman I had been asked to ‘take in’, that civilized man practises a strange ingenuity in wasting on tedious exercises the brief span of his life.”

W. Somerset Maugham book The Moon and Sixpence

Source: The Moon and Sixpence (1919), Ch. 6, p. 22

“I made up my mind long ago that life was too short to do anything for myself that I could pay others to do for me.”

W. Somerset Maugham

"1941", p. 336
A Writer's Notebook (1946)

“He was always seeking for a meaning in life, and here it seemed to him that a meaning was offered; but it was obscure and vague. He was profoundly troubled. He saw what looked like the truth as by flashes of lightning on a dark, stormy night you might see a mountain range. He seemed to see that a man need not leave his life to chance, but that his will was powerful; he seemed to see that self-control might be as passionate and as active as the surrender to passion; he seemed to see that the inward life might be as manifold, as varied, as rich with experience, as the life of one who conquered realms and explored unknown lands.”

W. Somerset Maugham book Of Human Bondage

Source: Of Human Bondage (1915), Ch. 88

“Perfection is a trifle dull. It is not the least of life's ironies that this, which we all aim at, is better not quite achieved.”

W. Somerset Maugham book The Summing Up

Source: The Summing Up (1938), p. 297

“Men seek but one thing in life — their pleasure.”

W. Somerset Maugham book Of Human Bondage

Source: Of Human Bondage (1915), Ch. 45

“One of the falsest of proverbs is that you must lie on the bed that you have made. The experience of life shows that people are constantly doing things which must lead to disaster, and yet by some chance manage to evade the result of their folly.”

W. Somerset Maugham book The Moon and Sixpence

Source: The Moon and Sixpence (1919), Ch. 33, p. 119

“Both these men are in love with Natasha, Count Rostov's younger daughter, and in her Tolstoy has created the most delightful girl in fiction. Nothing is so difficult as to portray a young girl who is at once charming and interesting. Generally the young girls of fiction are colorless (Amelia in Vanity Fair), priggish (Fanny in Mansfield Park), too clever by half (Constantia Durham in The Egoist), or little geese (Dora in David Copperfield), silly flirts or innocent beyound belief. It is understandable that they should be an awkward subject for the novelist to deal with, for at that tender age the personality is undeveloped. Similarly a painter can only make a face interesting when the vicissitudes of life, thought, love and suffering have given it character. In the portrait of a girl the best he can do is to represent the charm and beauty of youth. But Natasha is entirely natural. She is sweet, sensitive, and sympathetic, willful, childish, womanly already, idealistic, quick-tempered, warm-hearted, headstrong, capricious and in everything enchanting. Tolstoy created many women and they are wonderfully true to life, but never another who wins the affection of the reader as does Natasha.”

W. Somerset Maugham

Leo Tolstoy and War and Peace
Great Novelists and Their Novels