Any discussion centered on GOD as the focal point then the answer should be coming from the Bible. Which is the word of GOD and not from the cognitive level of humans. From the Bible Children are a blessing from GOD. It did not say children born only from marriages are blessings. Although it is right for children to born into marriage so as to get proper tutorship from both parents. I believe every child is a blessing from GOD but training the child he right way is the responsibility on the parents.