Prayer Before Meditation, Study or Spiritual Reading

My God, I firmly believe that Thou art here present and I humbly adore Thee in union with the angels and saints. I am sorry for having sinned, because Thou art infinitely good and sin displeases Thee.
I love Thee above all things and with my whole heart. I offer Thee all that I am and all that I have, my soul with all its faculties, my body with all its senses.
Enlighten my understanding and inflame my will, that I may know and do what is pleasing to Thee. I beseech Thee to direct all the powers of my soul, all my thoughts and affections to Thy service and Thy glory as well as to my own sanctification and salvation.