When is enough, enough?

In the heat of argument, when emotions are high, at what point do you lose sight of what you're fighting for and which arguments you're willing to lose? And when the argument is recurring, how quickly do you lose sight of the big picture only to focus on winning the battle at hand?

I am struggling to answer these questions. When there's an aversion to conflict, the desire for peace and harmony prevails at almost any cost. The need for a return to some semblance of normalcy triumphs the need to compromise. If compromise is the key that unlocks the future, the dreams that you don't dare to dream for fear they may never come true, why would I be unwilling to bend? Especially if bending leads to dreams becoming reality...