con su mente en alto?
Que significa "con su mente en alto"?
siempre con su mente en alto, con una gran determinación y sus sueños firmes

Question

con su mente en alto?
Que significa "con su mente en alto"? 
siempre con su mente en alto, con una gran determinación y sus sueños firmes

Answer

It's kind of "head held high", like always trying to focus on your dreams, such as is written on the text, with a great determination, or even with goals. It's more common such as Antonio just told you, and a little bit weird to say it like you say though, but you can say it like that.

Answer

La construcción usual es "con su/la frente en alto"