Eknath Easwaran, the author of Passage Meditation, suggests this prayer as a good text for beginning passage meditation.
Lord, make me an instrument of your peace;
Where there is hatred, let me sow love;
Where there is injury, pardon;
Where there is doubt, faith;
Where there is despair, hope;
Where there is darkness, light;
And where there is sadness, joy;
Grant that I may not so much seek
To be consoled as to console;
To be understood as to understand
To be loved as to love;
For it is in giving that we receive,
It is in pardoning that we are pardoned,
And it is in dying that we are born to eternal life.