Sung or said at the opening of every Anglican Eucharist since Cranmer's 1549 Prayer Book — a brief invocation that the worshippers may be purified for the holy mysteries.
Anglican · Medieval (8th–15th c.)
The Collect for Purity
Almighty God, unto whom all hearts be open,
all desires known,
and from whom no secrets are hid:
Cleanse the thoughts of our hearts
by the inspiration of thy Holy Spirit,
that we may perfectly love thee,
and worthily magnify thy holy Name;
through Christ our Lord. Amen.