Definition and Significance:
In the biblical context, the concept of blood flowing holds significant theological and symbolic meaning. Blood is often associated with life, covenant, sacrifice, and atonement. The flowing of blood, therefore, is a powerful image that conveys both the physical reality of life and death and the spiritual truths of redemption and purification.

Old Testament Context:
In the Old Testament, the flowing of blood is prominently featured in the sacrificial system established by God for the Israelites. Leviticus 17:11 states, "For the life of the flesh is in the blood, and I have given it to you on the altar to make atonement for your souls; for it is the blood that makes atonement by the life." This verse underscores the belief that blood, as the life force, is essential for atonement and reconciliation with God.

The Passover event in Exodus 12 is another critical instance where the flowing of blood plays a pivotal role. The Israelites were instructed to apply the blood of a lamb to their doorposts, and this act of faith resulted in their deliverance from the final plague in Egypt. The blood served as a sign of protection and a foreshadowing of the ultimate sacrifice to come.

New Testament Fulfillment:
In the New Testament, the flowing of blood reaches its ultimate fulfillment in the person and work of Jesus Christ. The shedding of Christ's blood on the cross is central to the Christian faith, as it represents the new covenant between God and humanity. Hebrews 9:22 affirms, "According to the Law, in fact, nearly everything must be purified with blood, and without the shedding of blood there is no forgiveness."

The crucifixion of Jesus is depicted as the ultimate sacrifice, where His blood was poured out for the remission of sins. In Matthew 26:28 , Jesus declares during the Last Supper, "This is My blood of the covenant, which is poured out for many for the forgiveness of sins." This statement highlights the redemptive power of His blood, which brings about spiritual cleansing and reconciliation with God.

Symbolism and Theology:
The flowing of blood in the Bible is rich with symbolism. It signifies life, as seen in Genesis 9:4 , "But you must not eat meat with its lifeblood still in it." This command underscores the sanctity of life and the respect for the life-giving essence of blood.

Moreover, the flowing of blood is a symbol of sacrifice and covenant. The Old Testament sacrifices pointed to the need for a perfect and final sacrifice, which was fulfilled in Christ. The New Testament writers emphasize that Christ's blood establishes a new covenant, superior to the old, as it provides eternal redemption (Hebrews 9:12).

Practical Implications:
For believers, the flowing of Christ's blood is a reminder of the cost of redemption and the depth of God's love. It calls for a response of faith, gratitude, and obedience. The sacrament of communion, observed in many Christian traditions, commemorates the shedding of Christ's blood and serves as a continual reminder of His sacrifice and the believer's union with Him.

In summary, the concept of blood flowing in the Bible is a profound theological theme that encompasses life, sacrifice, covenant, and redemption. It is central to understanding the narrative of salvation history and the relationship between God and humanity.