Good and Evil are better understood from a Divine perspective available to us through faith in Christ.
Remember that the Adversary seeks to make himself like God. Just like the angels, God has given humans volition as well.
Additionally, after the Garden of Eden, one penalty for Satan was that God placed enmity in the heart of man towards him. Although Satan sought to counterfeit God's place in man's heart with himself, God changed the heart of man to always have enmity towards Satan naturally.
Although Satan might have a plan to counterfeit Paradise, even Satan is unable to prevent man in his volition from sinning. Many people too quickly associate our sin or rebellion from God's will with our identification with Satan. Nothing is further from the truth. Man hates Satan. If we rebel from God, many more rebel from Satan. Even though God might not control our volition by His choosing, likewise even Satan can't keep us from sin. We sin because we like to sin. We might be stupid, but we still have volition.
Love is not a complement to evil. The thought of giving without receiving anything in return is the definition of CHARIS or Grace, ..where we get our word Charity. Good and evil are better understood by understanding the meanings of righteousness and chaos. Faith places our trust in an an object that is non-meritorious of ourselves. All faith is from God.
I didn't mean for my post to imply love is a compliemnt to evil- I meant that through the triqals that evil brings, love grows stronger as it is tested and passes the trials brought on by evils.
also- one more point- While man's heart has an aversion to Satan, our hearts also have a propensity to desire the evil that Satan represents in a deceitful manner as desires (but they are truly evils, and not simply desires).