I think you grow wherever God plants you. I hope I'm growing as a person of faith as a Christian. That should be our number one objective this journey of life. That all starts with a personal intimate relationship with Christ and then being in prayer every single day about all of those things - being tenacious about it.
In the 20 long hungry years between my late teens and late 30s I bought in to virtually every new diet and/or exercise regime that hoved into view particularly at this most vulnerable time for those of us prone to poor body image - a new year.