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" Into some such a situation as this, Jesus defends himself by saying, “My Father is always at his work to this very day, and I too am working” (5:17). This utterance establishes at least three things. First, by referring to God as “my Father,” Jesus is implicitly saying that he himself is God’s Son. Second, because in the context Jesus is arguing that he has the right to do things on the Sabbath that other human beings do not have the right to do, he is declaring his sonship to be unique. Third, because the warrant for Jesus’s work on the Sabbath is grounded in the fact that God, his Father, works on the Sabbath, Jesus is implicitly claiming he has the prerogatives of God. "
― D.A. Carson , Jesus the Son of God: A Christological Title Often Overlooked, Sometimes Misunderstood, and Currently Disputed
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" In fact, contemporary systematic theology frequently generates dissertations on, say, John Owen’s view of the atonement (which properly belongs to historical theology) or perichoresis and personhood in the Trinity (which largely turns on philosophical theology), with relatively little work devoted to the kind of constructive, normative theology that builds a case, starting from the Bible, of what Christians ought to believe. Moreover, systematicians are sometimes at least as disdainful of rigorous exegesis as biblical scholars are of systematic theology. "
― D.A. Carson , Jesus the Son of God: A Christological Title Often Overlooked, Sometimes Misunderstood, and Currently Disputed
