Spe Salvi - Random Observation No. 2

On human freedom:

Since man always remains free and since his freedom is always fragile, the kingdom of good will never be definitively established in this world. Anyone who promises the better world that is guaranteed to last for ever is making a false promise; he is overlooking human freedom. Freedom must constantly be won over for the cause of good. Free assent to the good never exists simply by itself. (Spe Salvi 24)

That's a very succinct description of our fallen reality: Freedom must constantly be won over for the cause of good.