Universally acknowledged as the patron saint of animals, St. Francis was born in 1182. Although he didn't acually write the words below, they're said to encompass his beliefs:

Lord, make me a instrument of thy peace,
that where there is hatred, I may bring love;
that where there is wrong, I may bring the spirit of forgiveness;
that where there is discord, I may bring harmony;
that where there is error, I may bring truth;
that where there is doubt, I may bring faith;
that where there is despair, I may bring hope;
that where there are shadows, I may bring light;
that where there is sadness, I may bring joy.
Lord, grant that I may seek rather to comfort than to be comforted;
to understand, than to be understood;
to love, than to be loved.
For it is by self-forgetting that one finds.
It is by forgiving that one is forgiven.
It is by dying that one awakens to Eternal Life.

Merry Christmas and peace to you and yours.