All waters are brooded over by Nârâyana, but every kind of water is not fit for drink. Similarly, though it is true that the Almighty dwells in every place, yet every place is not fit to be visited by man. As one kind of water may be used for washing our feet, another may serve the purpose of ablution, and others may be drunk, and others again may not be touched at all; so there are different kinds of places. We may approach some, we can enter into the inside of others, others we must avoid, even at a distance.
Ramakrishna
The only way to understand what’s evil, and how evil is not a dual reality outside the Absolute, is through the understanding of contingency, simple events, that lies in the manifested realm of existence. This manifested realm must contain the elements that permit movement which are ultimately represented in the Ying-Yang symbol, a fluctuating duality between light and shadows, where possibilities are open to be in endless combinations, and none of these combinations is outside of the One.
The fall from grace is an event which is proper from the manifested realm, but this fall comes from the confusion itself of the uses we give to the things in this world rather than the things by themselves. Whereas food is there to nourish us, we have separated this purpose to only focus in the instant gratification of gluttony, as we do with sex, with sleep, with art, etc.
Therefore, the right uses of the things in this world, can lead us to a holier life. “All things are lawful for me, but all things are not helpful. All things are lawful for me, but I will not be brought under the power of any.” Corinthians 6:12. In the contingency of this world, and in our independence, we feel free to take any pleasure with no consequence to our good, nonetheless, we must be wise to choose what things are really helpful, in order to reach God through His will, in the use we give to the things in this world, to finally transcend the duality of this manifested realm, to be not brought under the power of any thing.
To use the right waters in the right places is the ultimate act of human in accordance to the design itself of reality. That’s the end of sin and the beginning of grace.