I saw this prayer in Henri Nouwen's book, "Show Me the Way: Readings for Each Day of Lent". It is about serving God as the number one commandment, with all your heart, soul, and mind.
I abandon myself into your hands;
do with me what you will.
Whatever you may do, I thank you;
I am ready for all, I accept all.
Let only your will be done in me,
and in all your creatures.
I wish no more than this,
Into your hands I commend my soul;
I offer it to you with all the love
of my heart,
for I love you, Lord,
and so need to give myself,
to surrender myself into your hands,
with boundless confidence.
For you are my Father.
by Charles de Foucauld
Another good one from this post
“Advance with simplicity on the pathways of God, and do not worry. Hate your defects, yes, but quietly, without excitement or anxiety. It is necessary to be patient with them and to benefit from them through holy humility. For if you lack patience, your imperfections, instead of disappearing, will only grow. Because there is nothing which strengthens our defects as much anxiety and obsession to be rid of them. Cultivate your vineyard together with Jesus. To you the task of removing stones and pulling up brambles. To Jesus, that of sowing, planting, cultivating and watering. But even in your work, it is still him who acts. Because without Christ, you could do nothing whatsoever.” —St. Padre Pio