What does but it is doubtful yet whether Caesar will come forth today or no For he is superstitious grown of late Quite from the main opinion he held once of fantasy of dreams and ceremonies mean?

This statement suggests that Caesar has become increasingly superstitious, diverging from his previous skepticism about omens and rituals. The uncertainty about whether he will appear today reflects the influence of these newfound beliefs, indicating a change in his character. It highlights a tension between his earlier rational views and his current reliance on superstition, which may affect his decisions and leadership.