In respose to the reference of the snake. Keep in mind that up util this point the world was without sin.

Now forever, The snake would be a symbolic reminder of the Fall of man.
Everytime man would see a serpent he would be reminded that it was the instrument by which he fell into sin. Man was to have dominion and rule over the animal kingdom and yet it was through an animal that he was led astray! That tells man something about the seriousness of the original Fall and also about how culpable he really is.

The snake would be a symbolic reminder of Satan’s future destruction.

The snake imagery is picked up in Genesis 3:15 when the snake is told: ‘he the woman’s seed will crush your head and you will strike his heel.’ The snake was cursed to crawl on the ground and therefore susceptible to man’s heel crushing its head (this vulnerability is a direct result of Satan’s sin). This is a foreshadowing of what will really happen to Satan someday.

In addition, the curse upon the physical snake was reflective of the actual curse upon Satan himself: crawling low on the belly was a mark of deep degradation (Lev 11:42) and eating dust was also a sign of despair (Micah 7:17). All these factors combine to form very vivid symbolism of what awaits Satan in the end.

Animals were culpable when used as instruments of sin. Interestingly, elsewhere in the OT when an animal is an instrument in sins against nature he is to be slain along with the man (Lev 20:15,16). Is that because there is real blame and guilt on the part of the animal? No, but because the instrument is often broken/punished along with the actual perpetrator.

God has the right to curse an animal in a specific way due to the sin of another; He did that very thing in regard to Adam’s sin. When Adam sinned and threw all of creation into chaos, God cursed the ground so that it produced thorns and he was told to til the feilds. Was the ground to blame? Was it actually guilty? No, but it was rightly punished due to the sin of another and is a symbolic reminder to us of that very sin.

Can you imagine a world with no death, thorns, pain, disease, difficulty, struggle for survival? The world before the Fall was radically different. So, there is no difficulty in imagining the serpent as changing to crawl on its belly even though we are not totally sure what he was like before.
ambassador said:
Now forever, The snake would be a symbolic reminder of the Fall of man.

The snake would be a symbolic reminder of Satan’s future destruction.
Yet, we read in Numbers 21 that the snake shortly thereafter is transformed into the symbol of God's healing, as it is held aloft upon a pole for the healing of the Israelites beset by God's judgment. In fact, this story from Numbers is often taken as a bit of Christ symbology. Interesting . . .
And to add a truly bizarre twist to the whole affair, we furhter read in 2 Kings 18 that the Messianic King Hezekiah, centuries after Moses, has to smash this healing symbol apart because the healing symbol of the snake upon a pole has become, in and of itself, the object of worship to idolatrous Israelites.

Ok, lets look at numbers: Numbers 21 4-9

4- They traveled from Mount Hor along the route to the Red Sea, to go around Edom. But the people grew impatient on the way;

5- they spoke against God and against Moses, and said, "Why have you brought us up out of Egypt to die in the desert? There is no bread! There is no water! And we detest this miserable food!"

6-Then the LORD sent venomous snakes among them; they bit the people and many Israelites died.
7- The people came to Moses and said, "We sinned when we spoke against the LORD and against you. Pray that the LORD will take the snakes away from us." So Moses prayed for the people.
8-The LORD said to Moses, "Make a snake and put it up on a pole; anyone who is bitten can look at it and live."9-So Moses made a bronze snake and put it up on a pole. Then when anyone was bitten by a snake and looked at the bronze snake, he lived.

So you see GOD sent the snakes to punish the people who had sinned. This is in keeping with the historical symbol of the snake.
Then God says to Moses to make a Bronze snake and if the people look at it they will live. So in the end GOD shows his ultimate control.
Yes, this is true. But you have to understand that the isarealites had to realize that the power was not in statues or bronze images, but in God. God can choose whatever instrument he will. But the problem came when they began to look to idols rather than GOD. So you see they made the stutue itself a symbol of faith, that is why it was destroyed.
Nevertheless, the serpent is both the instrument of God's judgment and the symbol through which God's healing occurs. It's an interesting paradox. And you are correct. They made the serpent on the pole, upon which those who looked were healed, a symbol of faith. That is why it was destroyed.