Collect for Purity

Prayer Book Bible Reading Book Of Common PrayerAlmighty God,
to whom all hearts are open,
all desires known,
and from whom no secrets are hidden:
cleanse the thoughts of our hearts
by the inspiration of your Holy Spirit,
that we may love you,
and magnify your holy name;
through Christ our Lord. Amen.

Source: 11th-century Leofric missal, also attributed to the Gregorian Sacramentary (7th Century)

Source of this version: Modified from 1980 Alternative Service Book via wikipedia.com

Traditional English:

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.

Source: Book of Common Prayer

Latin:
Deus cui omne cor patet et omnis voluntas loquitur: et quem nullum latet secretum: purifica per infusionem sancti spiritus cogitationes cordis nostri: ut te perfecte diligere et digne laudare mereamur, per dominum nostrum iesum christum filium tuum qui tecum vivit et regnat in unitate eiusdem spiritus sancti deus, per omnia secula seculorum. Amen.

This prayer has its own page on wikipedia.

Variant:

…of your Holy Spirit, that every thought and word of ours may begin from you, and in you be perfectly completed, through Christ our Lord. (The Catholic Prayer Book, 1984, 1986)

Sarum version begins:

O God, unto whom all hearts be open…

The Lord’s Prayer

Matthew 6 (ESV)

Our Father in heaven,
hallowed be your name.
10 Your kingdom come,
your will be done,
on earth as it is in heaven.
11 Give us this day our daily bread,
12 and forgive us our debts,
as we also have forgiven our debtors.
13 And lead us not into temptation,
but deliver us from evil.

Luke 11 (ESV)

Father, hallowed be your name.
Your kingdom come.
Give us each day our daily bread,
and forgive us our sins,
for we ourselves forgive everyone who is indebted to us.
And lead us not into temptation.

Our Father, who art in heaven, Hallowed be thy Name. Thy kingdom come. Thy will be done on earth, As it is in heaven. Give us this day our daily bread. And forgive us our trespasses, As we forgive those who trespass against us. And lead us not into temptation; But deliver us from evil: For thine is the kingdom, and the power, and the glory, for ever and ever. Amen.

Source: Book of Common Prayer

Our Father in heaven,
hallowed be your Name,
your kingdom come,
your will be done,
on earth as in heaven.
Give us today our daily bread.
Forgive us our sins
as we forgive those who sin against us.
Lead us not into temptation
but deliver us from evil.
For the kingdom, the power, and the glory are yours
now and for ever. Amen.

Source: Alternative Service Book 1980