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The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown

H. P. Lovecraft (2014). “Complete Collection Of H. P. Lovecraft - 150 eBooks With 100+ Audiobooks (Complete Collection Of Lovecraft's Fiction, Juvenilia, Poems, Essays And Collaborations)”, p.11, Ageless Reads
The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown