John 17:20-21 NRSVue
20“I ask not only on behalf of these but also on behalf of those who believe in me through their word, 21that they may all be one. As you, Father, are in me and I am in you, may they also be in us, so that the world may believe that you have sent me.
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Some thoughts on this scripture
Lord, I treasure all the chances of fellowship with others who do not believe in you. When I work or talk with them, or love them, or serve or pray with them, your grace is at work in us. These occasions may not be labelled /ecumenical events/, but they carry your blessing.
Jesus' second prayer at the last supper is for future generations of believers, including ourselves. His prayer is that all of us will be united with God our Father and with him. He is to share with all of us what is deepest in his heart - the glory he had from the beginning of time. Love wants to share all that is best with the beloved.