The Burning Bush.
One of the most iconic, Instagram worthy images of the entire Egypt thing. After chasing down a runaway sheep, Moses notices a thornbush on fire, yet strangely, it was not consumed.
In the ensuing conversation, Moshe receives the mission of the century; Go to Pharaoh and tell him to "let 
my people go", and take the Jews out of Egypt. Sounds easy? Moshe definitely didn't think so. He protested "but they won't believe me!"
After 210 years of back-breaking slavery, the only reality that they ever knew, Moshe anticipated rejection, dismissal and mockery. Hashem gave him signs to prove that he was legit (think staff transformed into a snake).
When it came down to it, the Torah tells us "the nation believed" - not that they were persuaded by the miraculous sign.
This is what we are all about. We have an innate soul quality that continues to shine despite whatever shmutz (dirt) you heap upon it. They were never slaves, they were Jews compelled to do slave labor. They never lost their identity, never gave up their hope. Now with Moshe standing in front of them with a promise of a better life, it was the moment they had been yearning for and expecting for the last two centuries.
When we find ourselves in a situation that compromises who we are, we don't need to accept it. We can believe and hopefully merit a better tomorrow.