They occur spontaneously on their own when conditions are appropriate. The development of a spiritual ego is avoided by the realization that the phenomena are a gift from beyond our personal self; we are only the channels of Love, not its origin.
In reference to the Siddhis, the events like synchronicities and things that would appear to be miracles to the common mind. All kinds of powers can arise as one progresses. It’s best to remember that these are usually temporary gifts arising spontaneously and not something that the ego is doing or something to try and control or will into existence just because one can.
