A blessed life and a life that is cursed are opposites. Blessings are everything that is good and curses are everything that is bad. The Lord wants to bless us and warns against living a life that is cursed.
Psalm 109:17 He also loved cursing, so it came to him;
And he did not delight in blessing, so it was far from him.
You can either be a blessing or a cursing. Along with cursing comes bitterness. You can not have both sweet water and bitter come out of you, as God’s vessel, you are a fountain that will either bless or curse others.
James 3:8-11 But no one can tame the tongue; it is a restless evil and full of deadly poison. With it we bless our Lord and Father, and with it we curse men, who have been made in the likeness of God; from the same mouth come both blessing and cursing. My brethren, these things ought not to be this way. Does a fountain send out from the same opening bothfresh and bitter water?
What is your tongue like? Do you ever use curse words? Do you seek to bless others? Your tongue is what expresses what is in your heart.
Luke 6:44,45 For each tree is known by its own fruit. For men do not gather figs from thorns, nor do they pick grapes from a briar bush. The good man out of the good treasure of his heart brings forth what is good; and the evil man out of the evil treasure brings forth what is evil; for his mouth speaks from that which fills his heart.
What is the fruit of your lips? Do you bless the Lord and man? The only way you can be a blessing to God and man is to fill your heart with what is good for then your will speak from that which fills your heart.
Hebrews 13:15,16 Through Him then, let us continually offer up a sacrifice of praise to God, that is, the fruit of lips that give thanks to His name. And do not neglect doing good and sharing, for with such sacrifices God is pleased.
Death and life are in the power of the tongue and those who love to speak will eat its fruit. Your words will either give blessing and life or they will bring cursing and death.
Proverbs 18:21 Death and life are in the power of the tongue,
And those who love it will eat its fruit.
Instructions To A Young Life 