FM 23-25 Bayonet by United States War Department

"The will to meet and destroy the enemy in hand-to-hand combat is the spirit of the bayonet. It springs from the fighter's confidence, courage, and grim determination, and is the result of vigorous training. Through training, the fighting instinct of the individual soldier is developed to the highest point. The will to use the bayonet first appears in the trainee when he begins to handle it with facility, and increases as his confidence grows. The full development of his physical prowess and complete confidence in his weapon culminates in the final expression of the spirit of the bayonet - fierce and relentless destruction of the enemy. For the enemy, demoralizing fear of the bayonet is added to the destructive power of every bomb, shell, bullet, and grenade which supports and precedes the bayonet attack."