I will never be spiritually perfect ... there is a difference between "fit" and "perfect".
So I ask myself, "Have I ceased fighting everything and everyone?"
If I find myself struggling against something, I have a spiritual issue requiring resolution. I'm not quite fit at that time. It is not a wise idea for me to be around alcohol.
When I completely cease fighting, and I can face the day with a calm sense of serenity, I am spiritually fit. Not perfect, just fit ... for now.