As you have learned, scriptures confirm that your tongue can be controlled. But you must take the initiative to control your own tongue. The following verses all indicate actions you must take:
For he that will love life, and see good days, let him refrain his tongue from evil, and his lips that they speak no guile. (1Peter 3:10)
…Speak evil of no man…(Titus 3:2)
Let your conversation be without covetousness; and be content with such things as ye have… (Hebrews 13:5)
Only let your conversation be as it becometh the Gospel of Christ… (Philippians 1:27)
That ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts; And be renewed in the spirit of your mind; And that ye put on the new man, which after God is created in righteousness and true holiness. Wherefore putting away lying, speak every man truth with his neighbor…(Ephesians 4:22-25)
But now ye also put off…filthy communication out of your mouth. (Colossians 3:8)
Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers. (Ephesians 4:29)
Let all…evil speaking be put away from you…(Ephesians 4:31)
…be ye holy in all manner of conversation; Because it is written, be ye holy; for I am holy.
(1 Peter 1:15-16)
Put away from thee a froward mouth, and perverse lips put far from thee. (Proverbs 4:24)
Keep thy tongue from evil, and thy lips from speaking guile. (Psalms 34:13)
I said, I will take heed to my ways, that I sin not with my tongue: I will keep my mouth with a bridle, while the wicked is before me. (Psalms 39:1)
Whoso offereth praise glorifieth me; and to him that ordereth his conversation aright will I shew the salvation of God. (Psalms 50:23)
Thou shalt not take the name of the Lord thy God in vain; for the Lord will not hold him guiltless that taketh His name in vain. (Exodus 20:7)
Thou shalt not bear false witness against thy neighbor. (Exodus 20:16)