Right now, you have the ability and freedom to ponder whatever subject you wish. Whatever subject you wish!
Perhaps it’s thinking about what subject would be the best for you to consider. Maybe some lofty topic like ‘the Infinite’ or where to have lunch.
The more important the decision the more ‘feeling’ will be associated with your choice. With greater feeling comes greater impression of that thought on to the description board of who you really are.
In other words, what you deem as most important will be what shows up in greater abundance in your outward reality.