法華義疏 10.187

10.187

具有二義，機中為論，此事易明。言據事者，佛初出世，人天之流皆大歡喜，乃至釋梵請轉法輪，如言願見救療更賜壽命也。

Both senses are fully present. If discussed in terms of spiritual capacity, this matter is easily understood. As for saying it is based on historical facts: when the Buddha first appeared in the world, humans and devas alike were overjoyed, culminating in Śakra and Brahmā entreating him to turn the wheel of the Dharma, just like saying "we pray you will treat and heal us and grant us life again."