“Before Pharaoh can liberate the Jewish slaves, they must be ready to become free. You can take a man out of slavery, but it may prove more challenging to take slavery out of a man. Externally, you may be free; internally you may still be enslaved.
What is the first and foremost symptom of being free? That you learn to confer freedom on others.
The first Mitzvah the Jews had to hear from Moses before even he can go the Pharaoh to let them go free was: One day you will be free. Remember that freedom is a gift; use it to free others.”