Chih-i addresses the cause and effect that are stated in all sūtras, which can be similar or different from that of the Lotus Sūtra. However, Chih-i stresses that the cause and effect of the Origin stated in the Lotus Sūtra is unique. In terms of the cause and effect in the door of the Traces, in other sūtras, the gist can either refer to the cause, or the effect, or the combination of both cause and effect. Chih-i explains that the reason the gist is different in various sūtras is because different sūtras are expounded for different listeners. In terms of the cause and effect in the door of the Origin, it is unique as it is only expounded in the Lotus Sūtra. Its uniqueness differentiates itself from other sūtras, in view of the fact that the cause and effect in other sūtras is relative and belongs to the door of the Traces. This indicates that the gist of the Lotus Sūtra that refers to the cause and effect of the Origin is not contained in other sūtras. (Vol. 2, Page 440)