What does John 17:13 mean?
A common theme in Jesus' teaching to the disciples is delayed understanding. In many cases, His lessons were not fully grasped until after His death and resurrection. Some of that is simply due to hindsight (John 2:22). In other cases, that perception is thanks to the Holy Spirit (John 14:26). As Jesus pointed out, one reason for His teachings was to prepare the disciples for His eventual departure (John 16:4). Remembering their teachings from Christ, with the aid of the Holy Spirit (John 14:16) would not only help them more accurately understand the gospel (John 16:13), it would also give them strength to endure persecution (John 16:1).This is part of a prayer Jesus offers at the end of the Last Supper (John 13—16), prior to entering the garden of Gethsemane. There, He will be arrested and eventually crucified (John 18:1–3). This impending sequence of death, burial, and resurrection fulfills the prediction Jesus made earlier in the evening (John 16:16). This section of His prayer is most immediately for the sake of the disciples, but it also applies to future believers (John 17:20).