Greetings, the peace of God be with everyone!
The bible tells us about the new birth a person gets when approaching God and giving his heart, because it is very true that a person who knows God can never be the same.
God is the only one who has the capacity to be able to transform and change the human being outside of God for more effort that makes a
person would never change to God's perspective.
´The word of God taught by the Bible shows us that God forbids the curse and when someone does it brings a series of negative effects for the person who does it and his family.
the curse is a slavery in those who practice it
Source
In this sense I can object that God transforms the person's life in all his actions until he reaches a new vocabulary and a new life. So that a person transformed by God speaks differently to the world his building edifies builds blessings and brings peace. For this reason a person who has Jesus in his heart can never say words of curse
From the same mouth you cannot issue different convictions or you cannot speak of different beliefs or you believe in God or you believe in things that do not edify but rather curse.
James 3:10
¨ From the same mouth come blessing and cursing. My brothers, this should not be like this.
Matthew: 12:24
¨Litter of vipers, how can you who are bad say something good? From the abundance of the heart the mouth speaks¨.
The Spanish dictionary defines the word curse like this: Feel or express irritation or anger against a thing, a situation or a person
Source
Deuteronomy 30:19
¨To heaven and on earth I put today as witnesses against you that I have placed before you life and death, the blessing and the curse. Choose, then, life so that you live, you and your offspring¨
(Biblical quotes are taken from The Bible of the Americas © 1986, 1995, 1997).
God has placed before us the true path to choose and advises us to choose life so that we may live it with our offspring in blessing, for the curse brings destruction and death.
For this reason we cannot curse because when we do we are ignoring the accumulation of misfortunes and death that is accumulating around us. God has commanded us to bless because when we bless others we are blessing ourselves and we are earning blessings for our families.)