Quote by Karl Marx
Mankind always sets itself only such tasks as it can solve; since, looking at the matter more closely, we will always find that the task itself arises only when the material conditions necessary for its solution already exist or are at least in the process of formation.
This quote suggests that humans naturally set themselves achievable goals that they can solve. Upon closer examination, it becomes evident that these goals exist or emerge when the necessary material conditions for their resolution are already present or in the process of being created. In essence, humans tend to identify challenges that are within their capabilities given the existing circumstances.