三彌勒經疏 1.51

1.51

問：若爾，何故《放光經》云彌勒是未來佛？答：賢劫內時長，前後相望名為未來，而非星宿劫未來。

Question: If so, why does the Fangguang jing say that Maitreya is a future Buddha? Answer: The time within the Bhadrakalpa is long, and viewing earlier and later in relation to one another is called 'the future'; it is not the future in relation to the Constellation Kalpa.