Here is one amazingly inspirational article on a father who made the ultimate sacrifice - http://www.bloomberg.com/news/2011-06-17/a-father-s-day-lesson-about-children-and-life-jeffrey-goldberg.html
Fr. Longenecker has posted a great article on the Holy Trinity and Holy Fathers - http://gkupsidedown.blogspot.com/2011/06/holy-trinity-and-holy-fathers.html He provides a very good explanation of the Holy Trinity and explains the heresy of modalism.
Kathryn Lopez has posted a list of the top ten Father's Day quotes from the Bible - http://www.catholicvote.org/discuss/index.php?p=18271
Here is a thought-provoking post on prayer and spiritual battles called, The Three in One and The One in Three - http://beginningtopray.blogspot.com/2011/06/three-in-one-and-one-in-three.html