The prayer of Francis of Assisi instructs us in selflessness or self-forgetting to strive for:
Lord, make me an instrument of thy 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;
Where there is sadness, joy;
O Divine Master, 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 of the self that we are born
to eternal life.