“The emotional stress is a complex network of unusual strains inherent in the combat situation. The stress is derived from different sources, which again mutually reinforce each other.”
Source: Men Under Stress, 1945, p. 33 cited in: David Goodman Mandelbaum -(1952) Soldier groups and Negro soldiers. p. 78
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Roy R. Grinker, Sr. 17
American psychiatrist and neurologist 1900–1993Related quotes

Source: Words of a Sage : Selected thoughts of African Spir (1937), p. 39.

“Hindus and Mussalmans (Muslims) derive their inspiration from different sources of history”
Presidential Address to All India Muslim League's Session on March 22, 1940
Context: It is extremely difficult to appreciate why our Hindu friends fail to understand the real nature of Islam and Hinduism. They are not religions in the strict sense of the word, but are, in fact, different and distinct social orders, and it is a dream that the Hindus and Muslims can ever evolve a common nationality, and this misconception of one Indian nation has troubles and will lead India to destruction if we fail to revise our notions in time. The Hindus and Muslims belong to two different religious philosophies, social customs, litterateurs. They neither intermarry nor interdine together and, indeed, they belong to two different civilizations which are based mainly on conflicting ideas and conceptions. Their aspect on life and of life are different. It is quite clear that Hindus and Mussalmans (Muslims) derive their inspiration from different sources of history. They have different epics, different heroes, and different episodes. Very often the hero of one is a foe of the other and, likewise, their victories and defeats overlap. To yoke together two such nations under a single state, one as a numerical minority and the other as a majority, must lead to growing discontent and final destruction of any fabric that may be so built for the government of such a state.
Source: On including animal deaths in her work as symbolism in “An Interview with Yiyun Li” https://brickmag.com/an-interview-with-yiyun-li/ in Brick Magazine (2019 Feb 19)
Your Job-Hunt Ltd – Advice from an Award-Winning Asian Headhunter (2003), Successful Recruitment in a Week (2012) https://books.google.ae/books?idp24GkAsgjGEC&printsecfrontcover&dqnigel+cumberland&hlen&saX&ved0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIGjAA#vonepage&qnigel%20cumberland&ffalse, 100 Things Successful People Do: Little Exercises for Successful Living (2016) https://books.google.ae/books?idnu0lCwAAQBAJ&dqnigel+cumberland&hlen&saX&ved0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIMjAE

Source: 1930s, A Dynamic Theory of Personality, 1935, p. 41; partly cited in: Kay Deaux, Mark Snyder (2012) The Oxford Handbook of Personality and Social Psychology. p. 74