The words in bold in the quote below are meant to express something that I don't know how to put in English. The main idea is that someone is spending too much energy in many different areas thinking that he is going to achieve some considerable progress in all of them while in fact he is only going to enjoy a small amount of success (if any) in all those areas due to the enormous scale of area.
Jack: So what project did you choose for this semester?
Linda: The children illiteracy in in-land towns in Uganda, The correlation between humans' eating habits and their behavioral patterns, The possibility of practical application of the Poincaré conjecture solution in the nearest future, The affect of globing warming on blue whales migratory patterns...
Jack: Wow! Isn't it too many? Why not focus on only one project and research it thoroughly instead? I suggest that you should not shallowly spread yourself on so many projects.