2 Corinthians 4:1-18 (NKJV) The final challenge of recruit training in the Marines is known as the Crucible. It\u2019s called the Crucible after a hardened vessel that can withstand extreme heat that is so hot, it melts metal. The Marine\u2019s Crucible is a 54-hour training exercise that\xa0validates the physical, mental and moral training they\u2019ve endured\xa0throughout [\u2026]