Hitherto (εως αρτ). Up till now the disciples had not used Christ's name in prayer to the Father, but after the resurrection of Jesus they are to do so, a distinct plea for parity with the Father and for worship like the Father.

May be fulfilled (η πεπληρωμενη). Periphrastic perfect passive subjunctive of πληροω in a purpose clause with ινα. See John 15:11 for some verb (first aorist passive subjunctive with ινα) and 1. John 1:4 for same form as here, emphasizing the abiding permanence of the joy.