On this journey they were permitted to meet many difficulties, that their faith and trust in God might be tested. They were sometimes short of food to eat and water to drink, and as they neared the promised land great armies came out to destroy them. But the Lord helped them in every trouble, and gave them the victory over their enemies.
Part of their way lay through a hot, sandy desert, where they suffered from heat and thirst. But, instead of being patient, they rebelled against God, and found fault with Moses.
The Brazen Serpent.
Then the Lord let serpents come into the camp, whose bite was like fire, and brought sure death. Some in almost every tent were bitten.
This punishment showed them their sin, and they came to Moses and said, "We have sinned, for we have spoken against the Lord, and against thee. Pray unto the Lord that He take away the serpents from us." Numbers 21:7-9.
In answer to the prayer of Moses the Lord told him to make a serpent of brass, and raise it up on a pole, so that all in the camp could see it. Those who were bitten were told to look at this Serpent and they would be healed. The serpent could not heal them, but to look required faith, and faith brought the healing power.
The Lord could have healed them with a word, but the lesson must be complete. The lifting up of the serpent was to them a type of the lifting up of Christ on the cross, for through Him only could they receive pardon and relief from the consequences of sin. The brazen serpent was an object lesson to lead the children of Israel to look to Christ.
The Hebrews had the same Gospel, or good news of pardon and salvation through Christ, that we have. Speaking of them in the wilderness, the Apostle Paul says, "For unto us was the Gospel preached as well as unto them." Hebrews 4:2.
Every sacrifice they made for sin, every lamb slain, was to show their faith in "the Lamb of God, which taketh away the sin of the world." John 1:29. The blood of the offering was a type of the blood of Christ.