The 28th January is the Feastday of St Thomas Aquinas, on of the most prominent theologians of the Catholic Church. He is most famous for his philosophical and theological masterpiece, Summa Theologica.
Here is a prayer of his, from another of his texts, Something from a Saint.
Most loving Lord,
grant me a steadfast heart which no unworthy desire may drag downwards;
an unconquered heart which no hardship may wear out;
an upright heart which no worthless purpose may ensnare.
Impart to me also, O God,
the understanding to know you,
the diligence to seek you,
a way of life to please you,
and a faithfulness that may embrace you,
through Jesus Christ, my Lord.
Amen.
St Thomas Aquinas (1225 – 1274), in Something from a Saint