As a child of God, you were called into a blessing. And what so ever proceeded out of you is bound to be blessing. Understand that as a child of God you live in christ, christ is a location or a place that is were we live and no evil can penetrate there because darkness can not over shadow light. We are children of light blessed of the of Lord and no one can curse us.
let take a look on an account in the bible which involves Balak and the children of israel.
Numbers 23:13 And Balak said unto him, Come, I pray thee, with me unto another place, from whence thou mayest see them: thou shalt see but the utmost part of them, and shalt not see them all: and curse me them from thence.23:14 And he brought him into the field of Zophim, to the top of Pisgah, and built seven altars, and offered a bullock and a ram on every altar.23:15 And he said unto Balak, Stand here by thy burnt offering, while I meet the LORD yonder.23:16 And the LORD met Balaam, and put a word in his mouth, and said, Go again unto Balak, and say thus.23:17 And when he came to him, behold, he stood by his burnt offering, and the princes of Moab with him. And Balak said unto him, What hath the LORD spoken?23:18 And he took up his parable, and said, Rise up, Balak, and hear; hearken unto me, thou son of Zippor:23:19 God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good?23:20 Behold, I have received commandment to bless: and he hath blessed; and I cannot reverse it.23:21 He hath not beheld iniquity in Jacob, neither hath he seen perverseness in Israel: the LORD his God is with him, and the shout of a king is among them.23:22 God brought them out of Egypt; he hath as it were the strength of an unicorn.23:23 Surely there is no enchantment against Jacob, neither is there any divination against Israel: according to this time it shall be said of Jacob and of Israel, What hath God wrought!23:24 Behold, the people shall rise up as a great lion, and lift up himself as a young lion: he shall not lie down until he eat of the prey, and drink the blood of the slain.