One of the Holy Spirit’s primary missions is to give us assurance concerning our inclusion in Christ.

Post-Communion Prayer from The Book of Common Prayer (p. 366):

Almighty and everliving God,
we thank you for feeding us with the spiritual food
of the most precious Body and Blood
of your Son our Savior Jesus Christ;
and for assuring us in these holy mysteries
that we are living members of the Body of your Son,
and heirs of your eternal kingdom.
And now, Father, send us out
to do the work you have given us to do,
to love and serve you
as faithful witnesses of Christ our Lord.
To him, to you, and to the Holy Spirit,
be honor and glory, now and for ever. Amen.

Sermon from The Table.