Be aware of everything that arises in your mind immediately, as though watching your face in a mirror. Identify your emotions as the enemies that have spoiled your past lives, and will spoil your future lives, too, if you fail to cut them at the root as soon as they appear.
There is no emotion that you cannot be rid of, because emotions are simply thoughts, and thoughts are just like the wind moving through the empty sky. There is nothing to them.
However, in just the same way that someone who attains a high position may find that his worries and difficulties increase, so too, when you set yourself the ambitious goal of getting free from samsara, you may find that your thoughts and habitual tendencies seem even stronger and more numerous than before.
If you fall immediately under their power, your practice will be interrupted. It may stagnate, to the point that you end up as an old hermit only interested in making money. Or you could stray into an intellectual approach, endlessly acquiring more and more knowledge. But if you can manage to overcome your wild emotions by concentrating on sustained calm and profound insight, you are sure to make steady progress on the path.
When your mind is distracted, you can be bitten by a mosquito without your even noticing it. But when your mind is quiet, you will feel a mosquito bite straight away. In the same way, the mind needs to be relaxed and quietened if it is to become aware of its empty nature.
The practice of shamatha is done for this reason, and through such practice even a person with strong emotions will gradually acquire self-control and inner calm. When the mind comes to a stable state of relaxed concentration, your habitual tendencies fade away by themselves, while altruism and compassion naturally develop and expand. Eventually, you will come to a state of ease in the unceasing flow of the absolute nature. Why are all of us beings wandering in samsara?
As Chandrakirti said:
Beings think “I” at first, and cling to self;
They think of “mine” and are attached to things. They thus turn helplessly as buckets on a waterwheel,
And to compassion for such beings I bow down.
~Dilgo Khentsye Rinpoche