Fyodor Dostoevsky's poignant short story, 'A Faint Heart,' though sometimes presented as 'The Neighbor, A Weak Heart,' delves into profound psychological fragility. Published in 1848, it centers on Arkady Ivanovich, a humble government clerk whose overwhelming happiness at his engagement triggers an unexpected and tragic descent into mental instability. Consumed by perceived unworthiness and guilt, Arkady struggles to reconcile his inner world with the kindness he receives. Despite his friend's efforts, Arkady's delicate psyche unravels, showcasing Dostoevsky's masterful exploration of how intense emotions, even positive ones, can lead to despair and mental collapse. This work is a powerful study of the human condition and the perilous depths of the mind.