Mark 1: True Christians confess and turn from their sin.
Mark 2: True Christians follow Jesus in His word.
“Years ago no one would ever dare to rise in a meeting and say, ‘I am a Christian’ if he had not surrendered his whole being to God and had taken Jesus Christ as his Lord as well as his Saviour, and had brought himself under obedience to the will of the Lord. It was only then that he could say, ‘I am saved!’” A.W. Tozer
“The only man who has the right to say that he is justified by grace alone is the man who has left all to follow Christ.” Dietrich Bonhoeffer
“Verily I say to you, you cannot have Christ for your Savior unless you also have him as Lord.” Charles Spurgeon