Spear and Cross
The spear was one of mankind's earliest weapons and is still used today for hunting, fishing and for fighting (in modified forms such as the bayonet).
It was the weapon of choice from the Lower Palaeolithic era until firearms took over in the Renaissance.
At Jesus' crucifixion, the spear was as common as a policeman's revolver today.
Spear and Cross
Roman soldiers carried spears but the day after Jesus was crucified, a soldier attended the scene with another weapon; a club. His task was to break the legs of any victim hanging on a cross who was still alive. The purpose of breaking legs was to make it impossible for the condemned to push up their torso in order to breathe; breaking legs would suffocate the victim. It was critical that none of the victims were alive to defile the Sabbath, but when the soldier approached, Jesus appeared to have already expired.
To make sure of this, the soldier pierced the side of Jesus with a spear (John 19:31-34). Unbeknownst to the soldier, he was fulfilling a prophecy (John 19:36-37, Zechariah 12:10, Numbers 9:12 and Psalm 34:19-20) hence the spear's inclusion in the Arms of Christ.
From this wound flowed "blood and water". Although Jesus was presumed already dead at this time, the popular inference of the blood and water is that Jesus died of a broken heart. The blood is seen by Christians to represent redemption and the water represents baptism.
The spear is symbolic of a Christian's armoury. The spear is a weapon, used for hunting food or against an enemy. It is a Christian's duty to hunt truth and to fight evil. For this reason, the spear is a shown upright, ready for use. (See in contrast the Warrior's Cross.)
