What do they mean by that?
God saved me by blood,
The blood of His son.
Flesh to flesh and blood to blood.
The old marriage vows involved blood
Because they knew that blood is thicker than water.
But God gave me His son's blood.
Thicker still
Greater love hath no man, than this,
That he laid down his life
For me.
Greater love has no one than this: to lay down one’s life for one’s friends.(John 15:13, NIV)