You need to recognize when your mental gears are “grinding” and you need to stop and ask why. Most of the time just “pushing through” yields an unsatisfactory result. It is essential to understand why those gears are grinding. You may be asking the wrong question or you may be trying to attempt a solution that can’t be discovered yet. Many thinkers have damaged their long-term capacity, in their futile attempt to answer a futile question. Thinking, even difficult thinking, should be fluid – beware of “the grind.”