Answer
Diogenes, famed Cynic philosopher of Ancient Greece, sought resilience through voluntary exposure to discomfort and material deprivation. Rejecting societal norms and conventions, he lived a life of simplicity and self-sufficiency. By enduring harsh conditions, from extreme weather to frugal means, Diogenes aimed to strengthen his mental and physical fortitude, demonstrating his belief that virtue could be attained through rigorous self-discipline and resistance to worldly enticements.