Shared ground
These verses are the opening greeting of 2 Peter. The writer presents himself as Simon Peter and uses two paired descriptions: he belongs to Jesus as a servant and represents Jesus as an apostle. That combination signals both loyalty and authorized responsibility.
The readers are addressed as people who have “obtained” a faith that is equally valuable with the writer’s own group. The greeting does not create a higher and lower tier of believers; it stresses shared standing.
The shared faith is connected with righteousness and with the titles used for Jesus, including the striking phrase “our God and Savior, Jesus Christ.” The greeting then asks that grace and peace would increase, and it ties that increase to knowing God and knowing Jesus as Lord.
Where interpretation differs (only where needed)
1) What “obtained” suggests about how faith is received. Some read the word as emphasizing faith as a gift or granted share; others think it can simply mean “to receive” without specifying how.
2) How the phrase “in/through the righteousness” functions. Some take it as the basis that makes this shared faith possible; others as the means by which it comes; others as the setting in which this faith is held and recognized.
3) Whether “our God and Savior, Jesus Christ” refers to one person or two. Many read it as calling Jesus both “God” and “Savior.” Others read it as a reference to God (the Father) and to Jesus (the Savior) side by side, even though the wording is tight.
4) What “knowledge” most emphasizes. Some hear relational familiarity and lived recognition; others emphasize instruction and understanding; others treat it as a shorthand for acknowledging who God and Jesus truly are.
Why the disagreement exists
The main pressure points come from compact Greek phrasing that can be read in more than one way (especially the “God and Savior” line and the “in/through righteousness” connection). Also, the greeting uses loaded words (“obtained,” “righteousness,” “knowledge”) without explaining them yet, leaving readers to infer from wider New Testament usage and from themes later in 2 Peter.
What this passage clearly contributes
Explicitly, the text establishes (1) the writer’s claimed identity and authority, (2) the equal worth of the readers’ faith alongside the writer’s circle, (3) a close connection between that shared faith and God’s/Jesus’ righteousness, (4) exalted titles for Jesus within the greeting, and (5) a link between increasing grace/peace and the knowledge of God and Jesus. These lines set up 2 Peter’s later focus on “knowledge” as the context for stability and growth (compare 2 Peter 3:18).