What needs to be considered is the story of Lazarus and the rich man. Though a parable, Jesus based HIS stories on TRUTH. In the story the rich man is in hell and asks Abraham to allow Lazarus to come and provide even a few drops of water. WHERE WAS THIS TAKING PLACE?!? It must be understood that the story takes place BEFORE Jesus arose from the grave. Now, considering and understanding of Dispensationalism and the various AGES since CREATION, when people died they all went to the grave. HOWEVER, it appeared that the believers of a SAVIOR/REDEEMER to come one day were kept separated from those LOST. The awaiting "righteous" ones went to ABRAHAM's BOSOM (also known as PARADISE), while the "lost" went to another place separated from the "righteous" by a GREAT GULF fixed between them. And so in the story this is exactly what Abraham says to the former "rich" man is the reason no one can cross over to help him.
NOW, when Jesus gave up HIS SPIRIT, HE went to Paradise and preached to those held there and then released ALL the souls of the "believers" who had been waiting ---- and those souls were then free to enter into heaven. PARADISE was emptied and HELL was enlarged or increased to assume the entire realm. It's there but it does take some study to arrive at this consideration.