Read my post on Path to Holiness: Darkness Within Faith, Blessed Teresa of Calcutta
Jesus came to bring the good news to the poor. He had told us what that good news is when He said: “My peace I leave with you, My peace I give unto you.” He came not to give the peace of the world which is only that we don’t bother each other. He came to give the peace of heart which comes from loving – from doing good to others…
I feel that the greatest destroyer of peace today is abortion, because it is a war against the child, a direct killing of the innocent child, murder by the mother herself.
And if we accept that a mother can kill even her own child, how can we tell other people not to kill one another? How do we persuade a woman not to have an abortion? As always, we must persuade her with love and we remind ourselves that love means to be willing to give until it hurts. Jesus gave even His life to love us. So, the mother who is thinking of abortion, should be helped to love, that is, to give until it hurts her plans, or her free time, to respect the life of her child. The father of that child, whoever he is, must also give until it hurts.
By abortion, the mother does not learn to love, but kills even her own child to solve her problems.
And, by abortion, the father is told that he does not have to take any responsibility at all for 
the child he has brought into the world. That father is likely to put other women into the same trouble. So abortion just leads to more abortion.
Any country that accepts abortion is not teaching its people to love, but to use any violence to get what they want. This is why the greatest destroyer of love and peace is abortion…
“Let us bring the child back.” The child is God’s gift to the family. Each child is created in the special image and likeness of God for greater things – to love and to be loved. In this year of the family we must bring the child back to the center of our care and concern. This is the only way that our world can survive because our children are the only hope for the future…
Jesus said. “Anyone who receives a child in my name, receives me.” By adopting a child, these couples receive Jesus but, by aborting a child, a couple refuses to receive Jesus…
In destroying the power of giving life, through contraception, a husband or wife is doing something to self. This turns the attention to self and so it destroys the gift of love in him or her. In loving, the husband and wife must turn the attention to each other as happens in natural family planning, and not to self, as happens in contraception. Once that living love is destroyed by contraception, abortion follows very easily.
~from Mother Teresa’s speech at the National Prayer Breakfast, Feb. 3, 1994