"Science begets knowledge, opinion ignorance.
It is all very well saying + combines with -. That is a vast oversimplification.When you think of an answer you imply positive towards some thing and negative towards others there is some balance in most minds . on matter of positive and negative.
your mind is space as an example based in positive and negative answers yet it is still bound by other energies holding it in place. each mind is different as space is all different.
We have explored in other threads that + has to reach - for this to happen.
Especially with an expanding Universe + and - separate very rapidly. After the 'first rush' when there are lots of each around, it takes longer to link up. In Chemistry we call it Reaction Kinetics. Nothing new under the Sun, is there?
The last matter and anti-matter may never find each other.