Psalms 23

1The Lord is my shepherd, I shall not want.
2He makes me lie down in green pastures; he leads me beside still waters;
3he restores my soul. He leads me in right paths for his name's sake.
4Even though I walk through the darkest valley, I fear no evil; for you are with me; your rod and your staff— they comfort me
5You prepare a table before me in the presence of my enemies; you anoint my head with oil; my cup overflows.
6Surely goodness and mercy shall follow me all the days of my life, and I shall dwell in the house of the Lord my whole life long.

Note: The answers above try to mostly come direct from the Bible (New Revised Standard Version - NRSV).