Dual Opposing Emotions

Today the sun was setting and I started to think about how good it would be to go for a walk, not only for the beauty but for my daily exercise. I noticed a part of me that wanted to go (motivation) and another part of me that didn’t (tired wanting to relax at home). The emotions felt equal in strength, and each emotion, of course, had its own thought in models. My question is that I felt simultaneously two emotions/thoughts that were exactly opposite, and where are these originating from? Is this the different parts of the brain?