Out of slavery

1.  Slaves lose their self identity. They become completely subservient to their master/s. No decision is made unless the master benefits and gives his ok. In return the servant is given shelter, food and protection. In many ways the slave master and the idols/false G-D's play the same role to the servant/worshiper. There is a real fear by the slave/worshiper, that if he stops serving his master/G-D; then the food, shelter and protection would be seriously at risk.

Judaism introduced a revolutionary concept; that man is free from all forms of slavery; whether it is under man or whether it is bribing a G-D or whether it is even being a slave to one's own desires and thoughts.
Judaism doesn't want us  to be subservient to even a King; unless of course because of our given freedoms, we demand one. Even then, the chosen king has limited power. He is not allowed to amass wealth, horses(army) or wives. He is limited in his power by playing a role of a judge, with Torah constantly placed on his arm.
Even with our own worship of G-D, we are to do so, by improving ourselves and our relationship with our fellow man; in order to achieve closeness to G-D. Our sacrifices are not designed to bribe G-D but instead are to channel our drive to be mastered, into something productive. A sacrifice must be brought in a central location where all of the nation gathers with a goal of forming a community, mass education and a unified focus on the fundamental principles of our religion; with the central pillar being the idea of a non physical "first cause", that abhors slavery in all it's forms.
In the location of the sacrifices we have our supreme court, a gathering of the most educated and an economic system that is designed to help the less fortunate without reliance on an intrusive govt.
Even after G-D gave us the Torah he gave us the freedom to take control of his law and make it our own. That is the fantastic concept that the Rabbis have taught us,
 תורה לא בשמים היא.   
 
It took forty years of wandering in a desert for the Jewish people to understand this foundation of Judaism and the worship of the true G-D.
Like a drug addict it could not happen instantly but had to happen very slowly via weaning the Jewish people off the addiction of being mastered. That is why the ענן, באר and the מן was a necessity during this education process; just like a Heroin addict that is  given dangerous drugs to wean him off his even more dangerous addiction.
When finally entering Israel, the next generation of the desert was fully educated on what Judaism expected from them; complete freedom and self empowerment. They understood that they were not  to abandon the ability to control their lives/destiny to slave masters, Govt or even G-D.
It is G-D himself that tells us that we are given free will to choose between good and evil.  We are told by G-D to throw off the yolk of all forms of slavery and to move on to make the best of ourselves and the world around us. The nation of Israel is to be an example to the world, of what true freedom is supposed to look like. All the greatest Democracies in the world today, were developed as a result of this Judaic concept of freedom; that was first introduced to the world when the Jews left Egypt.
This pasuk in this weeks Parsha say all of this in twelve words.

 שמות טו: וַיֹּאמֶר יְהוָה אֶל-מֹשֶׁה, מַה-תִּצְעַק אֵלָי; דַּבֵּר
אֶל-בְּנֵי-יִשְׂרָאֵל, וְיִסָּעוּ.

 And the LORD said unto Moses: 'Wherefore criest thou unto Me? speak unto the children of Israel, that they go forward