To be an emotional master first you take full responsibility for the way you feel by recognising that it's coming from within. Externalities can only ever trigger already-present inner feelings. Then, it becomes a matter of being willing to feel the way you feel by letting go of the unwillingness to feel the way you feel. To let go of the unwillingness you can understand where it comes from. As you understand the source of the unwillingness you'll have the aha moment which tends to be followed by a release of control and a letting go. Then the willingness arises and the feeling is allowed to pass through you via unification with that which you are experiencing.
