O my God, I firmly believe that you are one God in three divine Persons, Father, Son, and Holy Spirit; I believe that your divine Son became man and died for our sins, and that he will come to judge the living and the dead. I believe these and all the truths which the Holy Catholic Church teaches, because you revealed them, who can neither deceive nor be deceived.
Further reading
For readers who want to explore the virtue behind this prayer, Josef Pieper offers a thoughtful philosophical study of faith alongside hope and love.
Faith, Hope, Love by Josef Pieper (paperback) on Amazon (paid link)