"Personally I Thought - that maybe you're suppose to think with your heart.
Like try to believe the best"
I would say, love and accept yourself and others with your heart .. Heart/Love/Compassion/Acceptance/Service ... and feel with your gut. Gut/Instincts/Intuition/trusting self ... Both work together beautifully.
In Eastern traditions (such as Tai Chi) they always talk about the 3 brains centres - the mind, the heart and the gut.