The phrase "Take No Prisoners" is usually used to denote being merciless but is it? It can describe tunnel vision on goals as well.
"Aggressive or decisive action is not always negative, however. A person who relentlessly pursues a goal and is not distracted by difficulties along the way may be quite successful. A student who combats health issues or lack of money and is able to get a degree may have done so in an aggressive way, but with positive results. Sometimes an objective requires unilateral focus in order to be achieved".Read More