This was God's desire from the time that He created man. It's not required for us to understand, only trust, believe, and follow Him. Case in point-God did not desire for Adam and Eve to know good and evil, just to serve Him. But, however, there are many folks calling themselves Christians that feel Calvary gives free license to do as you will. The only end it holds is the end of eternal damnation and bondage to Satan for those who will believe.
Love is the greatest thing of all.
The redemption is one time, the filling is continuous. The filling occurs as we yield to Christ, taking in His Spirit and at the same time, emptying ourselves of anything contrary to His Will. Whoever you hang out with is who you will favor the most. It only makes sense that in order to project the fullness of His Image, we must follow him and Him alone. Salvation occurs one time.