An instrument of Your peace

Apparently St. Francis of Assisi did not write what we know as The Prayer of St. Francis of Assisi.

Does it really matter? Its beautiful whoever wrote it.

Lord, make me an instrument of your peace.
Where there is hatred, let me bring love.
Where there is offence, let me bring pardon.
Where there is discord, let me bring union.
Where there is error, let me bring truth.
Where there is doubt, let me bring faith.
Where there is despair, let me bring hope.
Where there is darkness, let me bring your...