The mind has many functions, and thinking takes many forms.
The mind thinks with words, visions and feelings. Any combination of those things could be used in thinking.
Some feelings the mind thinks with are strong feelings, and these probably communicate more information to the person. In fact, unconsciously there could be many strong feelings that are felt to some degree that are also informative.
So I would think that simply a simple sequence of feelings is what lies behind how the mind thinks - and each feeling could trigger thoughts, visions or other associated feelings.
So an example of this would be - 'feeling of friend' followed by 'image of friend' followed by the words 'my friend is coming to visit'.