Pentecost Season · Twenty-sixth Sunday in Ordinary Time · Year B
Mark 9:38-43, 45, 47-48
Whoever Is Not Against Us and Warnings on Sin
September 26, 2027

Overview & Insights
"Whoever is not against us is for us." (Mark 9:40)
Jesus tells the disciples not to stop an outsider casting out demons in his name, then warns with vivid images against causing little ones to stumble and against whatever leads oneself into sin, urging his followers to be at peace with one another.
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Commentary
Commentary on Mark 9:38-50 Working Preacher
Luther Seminary exegesis of the outsider exorcist and Jesus' hard sayings about stumbling blocks for this Sunday of the Year B track.
Mark 9:38-50 Commentary Center for Excellence in Preaching
Reformed, sermon shaped reading of the disciples' desire to exclude and Jesus' warning against causing others to sin.
Mark 9: Whoever Is Not Against Us Enduring Word · David Guzik
David Guzik's verse by verse evangelical commentary on the whole chapter.
Mark 9 Commentary Precept Austin
A deep gathering of quotations, word studies, and cross references worked verse by verse.
Mark 9:38 Commentaries BibleHub
Aggregates classic commentaries such as Barnes, Gill, and Ellicott on the passage in one place.
Mark 9, Expository Notes StudyLight
Thomas Constable's expository notes on the outsider exorcist and the warnings against sin.
26th Sunday in Ordinary Time, Cycle B, Sunday Connection Loyola Press · Sunday Connection
Catholic background, reflection questions, and family prayer for the Sunday's readings.
Background & Word Study
Enter the Bible: Mark Enter the Bible
Luther Seminary background on Mark's authorship, setting, and journey toward Jerusalem.
Book of Mark Overview BibleProject
An animated walk through Mark's structure and themes to place chapter 9 on the road to the cross.
Mark 9:38 Greek Interlinear BibleHub
Greek word by word with parsing and Strong's numbers for close study of the passage.
The Church Fathers
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