My emotions don't have limits (apart from the emotion's nature itself). As for the environment blocking me, I break through it although that is not necessary as the environment is built up on my emotions, so it always acts according to them. But most of the time, the 'environment' is this case is the mind, not the physical world, in case someone missed this point. It is more like letting go of fear.
To recall an emotion and reproduce it you simply have to use your introverted intuition, that's why INFJs are so emotional after all.