Lest you be wise in your own sight, I want you to understand this mystery, brothers: a partial hardening has come upon Israel, until the fullness of the Gentiles has come in... (Romans 11:25 ESV)
"Of course, human beings perceive the course of history and events as they occur... The point is that the mere observation of these events does not translate into an understanding of what God is doing in history. Human beings see the bare events as they transpire, but they do not perceive the saving plan of God that is being accomplished in and through these events."
~ Thomas Schreiner, Romans (Baker Academic, 1998), p. 634.