Well... the true source of magic is Akasha, which is the source of all events and phenomena in the universe... but that's not what causes magic to be more limited. It's a bit strange to say, but the advancement of humanity in terms of technology and things like that actually caused the decline of magic by making more things possible through normal means. Magic is, by definition, something that cannot be accomplished through normal means, so if something becomes achievable it stops truly being magic and begins being a craft. For example, in the ancient past, manipulation of electricity by humans would have been magic, but now that it's commonplace it can no longer be considered such.
So, magic was effectively limitless at the dawn of humanity, but over time we've put our own limits on it.
[video]
Well... the true source of magic is Akasha, which is the source of all events and phenomena in the universe... but that's not what causes magic to be more limited. It's a bit strange to say, but the advancement of humanity in terms of technology and things like that actually caused the decline of magic by making more things possible through normal means. Magic is, by definition, something that cannot be accomplished through normal means, so if something becomes achievable it stops truly being magic and begins being a craft. For example, in the ancient past, manipulation of electricity by humans would have been magic, but now that it's commonplace it can no longer be considered such.
So, magic was effectively limitless at the dawn of humanity, but over time we've put our own limits on it.