How do we control our emotions?

Thanks for the question.
Here is a helpful article which will help answer your question.
https://www.gotquestions.org/managing-emotions.html
On a practical note, if there is a particular negative feeling or emotion that you are constantly struggling with, it is good to memorize scriptures which are related to it. At the end of the day, since we live in this world, the world’s ideas and views and problems may try to get into our minds. Hence it is important for us to keep ourselves filled with the scriptures and thus make it the primary influence in our lives.
God bless 😊