To be honest I am not sure what you mean by this. I am guessing the following: It is not the problems we encounter but the way we deal with them that determine our quality of life. Multiple sclerosis is a disease of the body but our minds and souls are still free. Is this what you mean?

I would like to know if I spelled it right, please. "It's not the kind of issue that determines our life but it's how we live the problem in function [of] our lives that determines the quality of the same. Multiple sclerosis is a disease of the body that allows the mind to travel "lying" (I think you mean to say separate or split from the body) and that allows the soul to [have] his continually." Mi sembra abbastanza corretto apparte l'uso di qualche preposizione e l'uso di lying altrimenti avresti potuto dire: that allows the mind to travel separate from the lying body and allows to the soul to have his continually.