Immediately (euthys; cf. 1:10) Jesus perceived in His spirit (inwardly; cf.14:38) their hostile thoughts and He confronted them directly with pointed counterquestions (a rhetorical device in Rabbinic debate; cf. 3:4; 11:30;12:37).
The scribes expected a physical healing, but Jesus pronounced the man’s sins … forgiven. They probably thought that a pronouncement of forgiveness was easier than one of healing because healing was visible and immediately verifiable.
Grassmick, John D. “Mark.” The Bible Knowledge Commentary: An Exposition of the Scriptures. Ed. J. F. Walvoord and R. B. Zuck. Vol. 2. Wheaton, IL: Victor Books, 1985. 112. Print.