Selection from Arcana Coelestia ~ Emanuel Swedenborg
It is easy to see that nothing can possibly enter into man's memory and remain there, unless there is a certain affection or love which introduces it. If there is no affection, or what is the same, no love, there will be no observation. It is this affection, or love, with which the thing that enters connects itself, and being connected remains; as is evident from the fact that when a similar affection or love returns, the thing itself recurs, and is presented to view along with other things that had before entered by virtue of a similar affection or love; and this in a series. From this comes man's thought; and from this thought his speech. In like manner also when the thing itself returns, if this is effected by objects of the senses, or by objects of the thought, or by the discourse of another, the affection also with which the thing had entered is reproduced. This is the teaching of experience, and on reflection everyone may be confirmed in it.
(from Arcana Coelestia 3336)