Thomas Aquinas

Give me, O Lord, a steadfast heart which no unworthy thought can drag downwards; an unconquered heart which no tribulation can wear out; an upright heart which no unworthy purpose may tempt aside. Bestow upon me also, O Lord my God, understanding to know you, diligence to seek you, wisdom to find you, and a faithfulness that may finally embrace you; through Jesus Christ, our Lord.