He learns thats there has been more than 1800 of his brothers before him.
The three ghosts in "A Christmas Carol" typically symbolize different aspects of Ebenezer Scrooge's past, present, and future. The Ghost of Christmas Past represents memories and reflection, the Ghost of Christmas Present embodies generosity and joy, and the Ghost of Christmas Yet to Come signifies fear of the unknown and consequences of one's actions. Together, they help Scrooge undergo a transformation and learn the importance of compassion and kindness.
They are Jacob Marley, The Ghost of Christmas Past, The Ghost of Christmas Present and The Ghost of Christmas Yet To Come. The first ghost is Jacob Marley, Scrooge's late business partner, warning him of continuing in miserly ways. Second, the Ghost of Christmas Past, who showed him how he used to be warm and generous and how he has changed into a mean and miserly man. Third, the Ghost of Christmas Present shows him that in the homes of both Bob Cratchit and Scrooge's nephew Fred, he is toasted in goodwill and affection (by most people). He explains how want and ignorance will destroy society if we do not learn to care for each other. Fourth, the Ghost of Christmas Yet to Come takes Scrooge to a vision of how he will die.
The Ghost of Christmas Present shows Scrooge the neglected and desolate moor to emphasize the consequences of his greed and indifference to others. By witnessing the isolation and suffering of others, Scrooge is meant to learn empathy and understand the impact of his actions on those around him.
The first, the Ghost of Christmas Past, takes Scrooge to the scenes of childhood and youth which stir the old gentler and tenderer emotions. The second spirit, the Ghost of Christmas Present, takes Scrooge to the home to observe his game of Yes and No and to the humble dwelling of his clerk Bob Cratchit to observe his Christmas dinner. The third spirit, the Ghost of Christmas Yet to Come, harrows Scrooge with dire visions of the future if he does not learn and act upon what he has witnessed.
Oh, dude, like, the most terrifying spirit to Scrooge was totally the Ghost of Christmas Yet to Come. That hooded, silent figure was giving off major creepy vibes, like, no doubt. Scrooge was shook by that silent treatment and those ominous vibes, for sure.
The Ghost sought to remind Scrooge that the Christmas season can be devastating for a child forced to be alone. Scrooge, of all people, should have been aware of this fact; but his life of greed had erased this fact from his thoughts. This is why the Ghost, after showing Scrooge the latter's boarding school, and hearing Scrooge state, "I could walk it blindfold!", pointed out, "Strange to have forgotten it for so many years."
Scrooge learns from the second ghost, the Ghost of Christmas Present, the importance of generosity, compassion, and the joy that comes from giving and sharing with others. He sees the happiness that can be found in simple acts of kindness and in caring for the well-being of others, ultimately realizing the value of spreading love and goodwill.
During the visit from the ghost of Christmas past, we learn that Scrooge was neglected by his family during his childhood, leading him to seek solace in books. We also see that he was a lonely and neglected child who longed for love and affection.
if you refer to his revisit to his dark past with the ghost of Christmas Past then it was for him to see and appreciate that as a young impressionable child he was abandoned at boarding school by his father even at Christmas when all of his peers were at home with their loving families celebrating Christmas. The ghost of Christmas Present makes a veiled reference to scrooges past when he states "you have not seen the likes of me before have you" meaning you have not seen a true Christmas before
even though people(cratchit and the nephew)aren't rich, they're still happy.
From the second spirit, the Ghost of Christmas Present, Scrooge learns the importance of compassion, generosity, and joy. He sees firsthand the impact of his actions on others and begins to realize that true wealth comes from giving and caring for those in need.