Untrammeled means completely free and unrestricted.
If you live an untrammeled life, you feel free to follow your dreams.
Feelings are sensations in our bodies. Anxiety is a cramped stomach, a sweaty neck, and a red hot forehead.
Thoughts create our feelings. The email from your mother isn't causing your anxiety; the thoughts you tell yourselves about the email are what make you anxious.
You can train your mind to change your thoughts and improve the way you move through life. This isn't some woo woo bullshit. These are scientifically backed Rational Emotive Behavioral Techniques.
If your thoughts are not serving you, kick them out and change the narrative. We get one chance on this big blue rock hurtling through space. Don't waste it.