I'll give you a hint, it's not Evangelion.

It actually came from a little known poem called "Pippa Passes" by a poet named Robert Browning. Here's the part with the famous phrase in it if you're interested.

The year’s at the spring,

And day’s at the morn;

Morning’s at seven;

The hill-side’s dew-pearled;

The lark’s on the wing;

The snail’s on the thorn;

God’s in His heaven— All’s right with the world