Here are few pieces of poetry for Ash Wednesday (and Lent).
For Ash Wednesday:
Almighty and everlasting God, you hate nothing you have made and forgive the sins of all who are penitent: Create and make in us new and contrite hearts, that we, worthily lamenting our sins and acknowledging our wretchedness, may obtain of you, the God of all mercy, perfect remission and forgiveness; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, for ever and ever. Amen
Ambrose of Milan, 4th century
O Lord, who has mercy upon all, take away from me my sins, and mercifully kindle in me the fire of thy Holy Spirit. Take away from me the heart of stone, and give me a heart of flesh, a heart to love and adore You, a heart to delight in You, to follow and enjoy You, for Christ’s sake. Amen. cf. Joel 2:1-2, 12-17
Prayer of St. Ephrem
O Lord and Master of my life, give me not the spirit of sloth, despair,
lust for power and idle talk.
But grant unto me, Thy servant, a spirit of wholeness, humility, patience and love.
Yea, O Lord and King, grant me to see mine own faults and not to judge my brother.
For blessed art Thou unto the ages of ages. Amen.