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- Sankara Acarya
- Santaraksita
- Sapir, Edward
- Schelling, F. W. J.
- Schopenhauer, Arthur
- Seliverstova, O. N.
- Seneca
- Shah, Idries
- Sharma, Chandradhar
- Sharma, Dhirendra
- Sharma, R. M.
- Shestov, Lev
- Singh, Balbir
- Sinha, Jadunath
- Spengler, Oswald
- Stcherbatsky, Th.
- Stoyanov, Zlatko
- Svyadostch, A. M.
- Swami Prabhavananda
- Swami Satprakashananda