Ask for a pure heart and freedom from temptation through the indwelling Spirit.
Historical edition. Historical claims and instructions are preserved as historical context.
For Purity of Heart
O MOST merciful and gracious God, we beseech Thee to hear our prayers, and to deliver our hearts from the temptation of evil thoughts, that, by Thy goodness, we may become a fitting habitation for Thy Holy Spirit; through Jesus Christ our Lord. Amen.