It’s like a pendulum, always in motion.
Pendulum swings in one direction and you can sustain faking happiness for a while.
Pendulum reaches its maximum height and starts going in the other direction, so you get tired of ‘happy’ and your mood sours.
The key, for your practice, is to keep the pendulum moving! If you halt the pendulum midway through the swing, you lose your emotion.
Force the opposite emotion, like get angry, and the motion, or emotion continues.
Back and forth, repeat. You can even do this within a few minutes. Fake happy for a minute, then allow yourself to go neutral, then get angry. Believe it and the emotions become real. That’s how it works.
It works for any emotional opposite pairs, including emotion vs no emotion. Lack of emotion is a powerful emotion as well! It has its place! Especially in certain types of magic.
Also lack of emotion is important when you need to turn your anger or happiness OFF and deal with life situations. I am not telling you to become bipolar or to reinforce bipolar behavior. No, I am asking you to play with emotions, learn to manifest them in you, and control your life.
Consider it part of your magic training. It takes will.
Emotion is power. It drives you and your magic, you just have to get that pendulum swinging.