Shared ground
Jude opens by identifying himself and the people he is writing to. Explicitly, he calls himself a servant of Jesus Christ and “brother of James.” He addresses people described not by their location or achievements but by God’s action toward them: they are “called,” “sanctified by God the Father,” and “kept for Jesus Christ.”
The greeting also sets a tone for what follows. Jude’s opening blessing—“mercy,” “peace,” and “love”—is not merely that these exist, but that they increase among the recipients.
Where interpretation differs
Two places draw real discussion.
First, “brother of James”: readers ask which well-known “James” Jude means, and therefore which Jude this is.
Second, the wording behind “sanctified”: some argue the original wording is better represented as “beloved” rather than “sanctified.” The main thrust remains that the recipients are defined by God’s relationship to them, but the specific emphasis differs.
Why the disagreement exists
James was a common name in the first century, so “brother of James” could point to different possible figures depending on what the audience would most readily recognize. Also, ancient copies of the letter show a small wording difference at the phrase translated “sanctified/beloved,” so translations choose based on which reading seems earliest and best explains the others.
What this passage clearly contributes
This opening frames Christian identity as received: called, set apart by the Father, and preserved with reference to Jesus Christ. It also links God the Father and Jesus Christ closely in the way Jude describes the community’s status and future. Finally, the letter begins with a positive, stabilizing wish—mercy, peace, and love in increasing measure—before later parts of Jude address threats to the community (see Jude 1:4).