Is it normal to be scared of eternity?
Mostly.Normal for most people
Yes, plenty of people feel scared or unsettled when they think about eternity. The idea can be hard to picture, and you don’t have to solve it to make the feeling pass.
Eternity is a huge, abstract idea, so it’s understandable if your mind gets stuck trying to imagine it. People may feel uneasy about endless time, the unknown, or what happens after death; others find the idea comforting or don’t think about it much. There isn’t one correct reaction.
If the fear shows up, it can help to bring your attention back to something concrete in the present—what you can see, hear, or do right now. If thoughts about eternity keep crowding out daily life, talking them through with someone you trust may help.