John 14:31

That the world may know. There is an ellipsis here, and some such words as “these things are taking place that the world may know, etc.,” should be supplied. The purpose clause may also be understood as a clause of result (see on ch. 9:3); that is, as a result of the events about to take place the world would be given a demonstration of Jesus’ love for the Father.

Arise, let us go hence. After Jesus and His disciples “had sung an hymn, they went out into the mount of Olives” (Matt. 26:30). The hymn was part of the Passover Hallel (see on Matt. 26:30). Many scholars think that the discourse of John 15; 16 and the prayer of ch. 17 were also given in the upper room, but there is no need to suppose a transposition in these chapters. The instruction of these chapters would have been as appropriate or even more so among the scenes of nature on the way to Gethsemane, especially with flourishing grapevines to illustrate the allegory of the vine and its branches. The slopes of Olivet had been the scene of extended instruction only two nights before (see on Matt. 24:1).