All human beings have a right to life. Our unborn children are members of the human race. They're human beings, so they have a right to life.
God allows unjust disparities between rich and poor because He does not miraculously intervene to establish justice against human wills. Also, discrepancies are not unjust by themselves; justice does not mean equality of result but equality of opportunity.
Argumentation is a human enterprise that is embedded in a larger social and psychological context. This context includes (1) the total psyches of the two persons engaged in dialogue, (2) the relationship between the two persons, (3) the immediate situation in which they find themselves and (4) the larger social, cultural and historical situation surrounding them.
Reading a book about something can be an obstacle to doing it because it gives you the impression that you are doing what you are only thinking about doing. It is tempting to remain in the comfortable theater of our imagination instead of the real world, to fall in love with the idea of becoming a saint and loving God and neighbor instead of doing the actual work, because the idea makes no demands on you. It is like a book on a shelf. But, as Dostoyevsky says, 'love in action is a harsh and dreadful thing compared to love in dreams' (The Brothers Karamazov).
The single most important piece of advice about prayer is one word: Begin!
I guarantee you that after you die you will not say 'I spent too much time praying; I wish I had watched more TV instead.