Arcana Coelestia # 3137
3137. 'At the spring' means the enlightenment of them from Divine truth. This is clear from the meaning of 'a spring' as truth, dealt with in 2702, 3096, here Divine truth, as above in 3131. Because the Word is Divine truth it is therefore called 'a spring'. That 'standing at the spring' here embodies in the internal sense the enlightenment of things in the natural man follows from the train of thought; for where Divine truth is, enlightenment is there.
Arcana Coelestia # 107
107. Verse 10 And a river was going out of Eden to water the garden, and from there it divided and became four heads.
'A river was going out of Eden 'means wisdom deriving from love, which is Eden. 'To water the garden' is to confer intelligence. 'From there to divide into four heads' describes intelligence coming through four rivers, as below.