But that the world may know (all' hina gnōi ho kosmos). Purpose clause with hina and the second aorist active subjunctive of ginōskō. Elliptical construction (cf. Joh 9:3; Joh 13:18; Joh 15:25). “But I surrendered myself to death,” etc., before hina.
Arise, let us go hence (egeiresthe, agōmen enteuthen). Imperative present middle of egeirō and the volitive (hortatory) subjunctive agōmen (the word used in Joh 11:7, Joh 11:16) of going to meet death. Apparently the group arose and walked out into the night and the rest of the talk (chs. 15 and 16) and prayer (ch. 17) was in the shadows on the way to Gethsemane.