I am fussy about my diet and straining my voice. I know sounds a bit over the top. But I'm not as bad as I used to be. These days I don't drink alcohol for five days before a show - very dehydrating for the vocal cords and all that acid reflux. I used to ban it for a fortnight. Nightmare.
Faith is a dynamic and ever-changing process not some fixed body of truth that exists outside our world and our understanding. God's truth may be fixed and unchanging but our comprehension of that truth will always be partial and flawed at best.