In one sense, it is not part of God's original plan for us that we should die and our bodies and souls be separated from each other until the resurrection of the dead at the end of time when Christ returns in Judgment. He created us in a state where everything was right between man and Creator and where man would always be fully integrated in body and soul, but the radical possibility to love comes with it the possibility that man will choose against love and thus commit sin and its effects.
There are two factors which contribute to the possibility to love and to participate in our own salvation moved by grace. One, God gave us the possibility of reason, which is distinct from all other living things. Through reason we can come to a certain knowledge of the One True God, even though it is clouded by sin, and with this comes the ability to judge (discern might be a more clear word sometimes), make decisions, and choose. It would be entirely inappropriate for a rational creature to have been kept in a state where they are given the beatific vision immediately without any possibility of choosing it for his or herself.
Second, God gave us time through the His work of creation. There is creation and then there is the eschaton, meaning time is in between. This is coupled onto the great gift of reason. Time would be utterly pointless if the ability to choose love did not exist, if we had nothing to fill the gap between the alpha and the omega. God could have just created us in a state of perfection, but He did not. Creation is constantly journeying towards perfection (as an aside, modern science, whether its practitioners admit it or not, is firmly in line with a Catholic cosmology, as all Truth is...), and for us humans this means we are brought to faith, living in hope, and working in love. Bear in mind that God is infinite, and He could have created any number of worlds, but this one came to be. There is no perfect world, or to counter Leibniz, there is no best of all possible worlds. Each has their flaws unknowable to human eyes.
|The Protoevangelium: And she will crush|
To be continued...