Sagan, Carl (1934-1996)

Sahl, Mort (1927-2021)

Salinger, J. D. (1919-2010)

Sand, George (1804-1876)

Santayana, George (1863-1952)

Saotome, Mitsugu (1926-2008)

Sarnoff, David (1891-1971)

Sartre, Jean Paul (1905-1980)

Schleiermacher, Friedrich (1768-1834)

Schlesinger, Jr. Arthur M. (1917-2007)

Schopenhauer, Arthur (1788-1860)

Schultz, Charles (1922-2000)

Schumacher, E. F. (1911-1977)

Schweitzer, Albert (1874-1965)

Scott, Howard

Scottish saying

Seabury, David (1885-1960)

Seuss, Dr. (1904-1991)

Shakes, Ronnie (1947-1987)

Shakespeare, William (1564-1616)

Shaw, George Bernard (1856-1950)

Shiller, Robert J. (1946-)

Shinn, Florence Scovel (1871-1940)

Shinseki, Eric, Chief of Staff, U.S. Army (1942-)

Sibelius, Jean (1865-1957)

Sihanouk, Norodom, Prince of Cambodia (1922-2012)

Simon, Herbert (1916-2001)

Sinclair, Upton (1878-1968)

Smith, Logan Pearsall (1865-1946)

Sockman, Ralph W. (1889-1970)

Socrates (470 B.C.E.-399 B.C.E.)

Solon (638 B.C.E.-558 B.C.E.)

Soviet joke

Spalding, John Lancaster (1840-1916)

Spanish proverb

Stalin, Joseph (1879-1953)

Stanford Dictionary of Philosophy

Stanton, Elizabeth Cady (1815-1902)

Stein, Gertrude (1874-1946)

Steinbeck, John (1902-1968)

Steinberg, Saul (1914-1999)

Steinem, Gloria (1934-)

Stengel, Casey (1891-1975)

von Sternberg, Josef (1894-1969)

Stevenson, Adlai (1900-1965)

Stone, I. F. (1907-1989)

Storey, David (1933-2017)

Stravinsky, Igor (1882-1971)

Strindberg, August (1849-1912)

Sturgeon, Theodore (1918-1985)

Syrus, Publilius (85 B.C.E.-43 B.C.E.)

Szent-Gyorgyi, Albert (1893-1986)