Philip K. Dick wrote some awesome stories. Many of them have been turned into awesome movies. This is one of them.
Dick starts his stories with an item of popular modern speculation, like robots with emotions or colonization of Mars. He then imagines what other things would be needed to make the popular premise real: cops would have to hunt down robots with dangerous emotions, air would become a controlled substance on Mars, and people who want to visit the red planet might opt for cheaper memory implants of a vacation instead of the actual trip.
With one of Philip's fully fleshed out premise and twist combinations, the plot almost writes itself. Even though Dick wrote mostly short stories with only two acts, it is easy to extrapolate a third act for a movie by simply asking what the hero would do next. In order for things to turn out good in a Dick world, a hero must transcend himself to create his own options. No story better illustrates this idea than "The Adjustment Bureau."
Imagine, as an item of popular modern speculation, that the New World Order (NWO) is an actual entity so powerful that it can create the illusion of free will without free will actually existing in big areas where humans could destroy ourselves. The NWO, or "Adjustment Bureau" in the film, has the ability to predict likely futures of our willful decisions and create circumstances in which our will is redirected toward more beneficial outcomes.
We never find out whether the "Chairman" who decides what is beneficial is God, the devil, or a bunch of greedy bankers. It doesn't matter, because the effect is the same: humans would not be humans without free will. Our intellect requires it. The grunts in the Bureau do not understand this, but the Chairman apparently does.
When our heroes overcome unworldly attempts to keep them apart because their union was at odds with the plan, and they kiss at the end, there was not a dry eye in the house. My friends tell me that achieving a love like that is more important than anything in this universe, that they would follow any plan leading to such a union, but does such a plan exist?
"The Adjustment Bureau" illustrates that blindly following a plan is at odds with the creativity and responsibility found at the heights of willful intimacy. We can try to write plans for others, or we can let ourselves become part of a plan, but the kind of love reached in this movie only exists where all parties to that love choose to write their plan together.