Just chance at work, very definitely. Think of it this way; if you only had two experiences in your life, and those two experiences happened to have strong similarities between them, then this would be very unlikely to happen by chance, and there would be good reason to suspect a deeper pattern. But you don’t have two experiences in your life; you have an infinite number of them. It would be extremely unlikely, therefore, for there not to be many, many instances of symbolic convergence. Essentially, the chance of two given events forming a coincidence is small; but the chance of any two events, out of the innumerable events you experience daily, having a ‘significant’ link between them, is quite large; so the fact that you observe coincidences, even with great frequency, is no evidence for an underlying pattern at all. This chance is further increased if you are inclined to read significance into coincidence, simply because there will be a greater number of connections that would qualify in your mind as meaningful. Such a disposition also makes you more liable to ignore the mathematical reasoning above and see only the events that do coincide, turning a blind eye to the much larger set of possible coincidences that don’t happen.