Here’s what Cardinal Mercier had to say:
Everyday I want you to close your eyes for a few moments and enter the chapel of your baptized soul, and there realize that God himself dwells. Pray this prayer:
O Holy Spirit, Soul of my soul, I adore you.
Enlighten, guide, strengthen, and console me.
Tell me what I ought to do and command me to do it.
I promise to be submissive to everything that you ask of me, and to accept all that you permit to happen to me. Only show me what is your will.