“God may or may not have created limbo so man, always eager to improve on God’s work, created it.”
Is Limbo and purgatory the same thing?
No. The Catholic Church never "believed" in limbo. The existence of limbo for unbaptized infants is not part of divine revelation, but rather was and is an educated theological "guess." The term was coined by St. Augustine of Hippo and literally means "fringe." This came about because God has not chosen to reveal what happens to deceased unbaptized infants. We know that baptism is absolutely necessary for salvation (John 3:5) because God revealed this. We also know that something called "baptism of desire" is possible. Since unbaptized infants seem incapable of any "desire" or act of their will, theologians have speculated throughout the ages about their destiny in this context St. Augustine thought that it would be an offense against God's justice to suppose He would allow such creatures to suffer any pain, but that rather God places such infants in a state of "natural," but not supernatural happiness for eternity. This he called "limbo." Other theologians say that God's "universal salvific will" (1 Timothy 2:4) includes unbaptized people who do not have the use of reason when they die and that they enjoy supernatural happiness by some means we do not now know. Catholics are free to believe or disbelieve in limbo.