A changed heart speaks of the Lord which saved them. Speaking of the world answers the world and speaking of spiritual matters speaks of heaven. The knowledge of the world pleases those who follow worldly things, but spiritual understanding tells how a soul has been delivered from darkness to light and are now a part of the kingdom of Gods Son! (Colossians 1:8-13) Who also declared unto us your love in the Spirit. For this cause we also, since the day we heard it, do not cease to pray for you, and to desire that ye might be filled with the knowledge of his will in all wisdom and spiritual understanding; That ye might walk worthy of the Lord unto all pleasing, being fruitful in every good work, and increasing in the knowledge of God; Strengthened with all might, according to his glorious power, unto all patience and longsuffering with joyfulness; Giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light: Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son.
Our conversation is highly unpopular to those who live for all this world offers, and at times our words fall on deaf ears as we keep our conversation set on God, and by doing so we see his salvation. (Psalm 50:23) Whoso offereth praise glorifieth me: and to him that ordereth his conversation aright will I shew the salvation of God.
The words we speak affects the ones who are listening, and as we read the word of God it can and will uplift another as well as save their soul when hearing! (1 Timothy 4:12-16) Let no man despise thy youth; but be thou an example of the believers, in word, in conversation, in charity, in spirit, in faith, in purity. Till I come, give attendance to reading, to exhortation, to doctrine. Neglect not the gift that is in thee, which was given thee by prophecy, with the laying on of the hands of the presbytery. Meditate upon these things; give thyself wholly to them; that thy profiting may appear to all. Take heed unto thyself, and unto the doctrine; continue in them: for in doing this thou shalt both save thyself, and them that hear thee.
There is power in the words we speak for the positive or the negative, and they even have the power of life and death ( Proverbs 18:21). As christians our conversations always resemble Christ as the old ways we used to follow are no longer a part of our life. We are born again from above and our conversation reflect it. (1 Peter 1:13-15) 13 Wherefore gird up the loins of your mind, be sober, and hope to the end for the grace that is to be brought unto you at the revelation of Jesus Christ; 14 As obedient children, not fashioning yourselves according to the former lusts in your ignorance: 15 But as he which hath called you is holy, so be ye holy in all manner of conversation.