Jeremiah 13

Can the Ethiopian change his skin
or the leopard his spots? Then may ye
   also do good, that are accustomed,
                to do evil.
                              Jeremiah 13:23

I need Thee, precious Jesus,

   For I am full of sin;
My soul is dark and guilty,
   My heart is dead within.
I need the cleansing fountain,
   Where I can always flee,
The blood of Christ most precious,
   The sinner’s perfect plea