February 19

I charge you all that each one of you concentrate all the thoughts of your heart on love and unity. When a thought of war comes, oppose it by a stronger thought of peace. A thought of hatred must be destroyed by a more powerful thought of love. Thoughts of war bring destruction to all harmony, well-being, restfulness and content. Thoughts of love are constructive of brotherhood, peace, friendship, and happiness. 
(‘Abdu’l-Baha, from a talk, Paris, October 21, 1911, ‘Paris Talks’)