Allan Kardec. The book of spirits (№ 396909)

Question: the Blessing and the curse can to promote the happiness or to cause distress to those to whom you refer?
Answer: God does not listen to an unjust curse, and the one who pronounces them guilty in His eyes. So how in the world there is good and evil, the curse can have a temporary effect, even in material terms, but the impact of it is only really in the will of God, and in this case, it can increase the test belongs to whom. However, for the most part curse the wicked and bless the good. A blessing and a curse can never reject the Dispensation from the path of justice. It Porojan damned only in that case if he deserves it, and patronize only those who deserve it.