This text explores the intricate relationship between thinking and speaking, starting from the premise that these two activities are closely linked but not identical. The author defines thinking as silent speaking and speaking as thinking out loud. To counter the misconception of their absolute identity, the text presents the case of a Dutch theologian who, after suffering a stroke, lost the ability to speak or write but retained the capacity to understand others and think clearly. The author challenges the view that the inability to articulate a thought implies an inability to conceive it clearly. In adults with established cognitive skills, the disruption of speech centers does not necessarily impair the process of thought itself. This distinction highlights the relative autonomy of mental processes in experienced individuals, for whom verbal formulation is a secondary step that can be hindered by neurological damage. The reflection contributes to the philosophical and cognitive debate regarding the boundaries between linguistic expression and internal cognition.