Thinking must be more complicated than a series of thoughts, words and visualizations that are either internal or external, however.
When an experience is recalled those things might be brought up - but each experience has a different character and that could bring up or trigger a different reaction entirely (that might be separate from the individual stimuli related to the experience).
Of course the stimuli in the experience help make that experience feel like what it feels like - however there are more complicated things occurring. For instance if three visions come from the experience maybe your mind would generate another vision that would be an internal representation of those three images from the experience.
Sensory inputs and internal outputs all are going to combine to form an experience, and the physical inputs might be recalled at various times to assist internal thinking.