I magine possessing a key that can open any door anywhere in the world. You could open any treasure chest explore any palace.
There is however one problem. You have no idea that this is a master key. You think it’s just the key for a side door of your house so you use it only when you want to clean the yard.
But what if you then realized that the key you own can fit into any lock? What a thrill. Endless possibilities dangle at the end of your key chain.
The brachah of shelo asani aved thanking Hashem for not making us slaves is akin to such a key. When we examine the meaning and depth of this brachah we’ll see endless vistas of spirituality suddenly open before us.