From the back of the card:

"Dear Saint and glorious martyr, teach us to love unselfishly and to find great joy in giving. Enable all true lovers to bring out the best in each other.  Let them love each other in God and in God..."

Prayer card includes the Scriptural passage "Love is patient" (1 Cor. 14:4-8) on back.  Card is laminated.  The feast of St. Valentine is February 14.