Keep thy speech as clean from all obscenity as thou wouldst thy meat from poison, and let thy talk be gracious, that he who hears thee may grow better by thee. And be ever more earnest when thou speakest of religion than when thou talkest of worldly matters. If thou perceivest that thou hast erred, persevere not in thine error; rejoice to find the truth and magnify it. Study, therefore, three things especially—to understand well, to say well, and to do well.
Suffer not thy mind to feed itself upon any imagination which is either impossible for thee to do or unprofitable if it be done, but rather think of the world's vanity, to condemn it; of death, to expect it; of judgment, to avoid it; of hell, to escape it; and of heaven, to desire it.
Make not a jest of another man's infirmity; remember thine own. Abhor the frothy wit of a filthy nature whose brains having once conceived an odd scoff, his mind travails till he be delivered of it; yea, he had rather lose his best friend than his worst jest. But if thou be disposed to be merry, have a special care to three things (Prov. 23:17; Phil. 4:4): first, that thy mirth be not against religion; second, that it be not against charity; third, that it be not against chastity, and then be as merry as thou canst, only in the Lord.
The sixth bar in the way to salvation is evil company. They will take us off our work. The sweet waters lose their freshness, when they run into the salt water; Christians lose their freshness and savouriness, among the wicked. Christ's doves will be sullied by lying among these filthy pots. Sinful company is like the water in a smith's forge which quenches the iron, be it ever so hot; such evil company cools good affections.https://www.gracegems.org/Watson/one_thing_necessary.htm
What trust should a man repose in long life? seeing the whole life of man is nothing but a lingering death; so that, as the apostle protests, a man dies daily.https://gracegems.org/24/practice_of_piety4.htm
Hereupon the carnal professor presumes, that though he continues a while longer in his sin, God will not shorten his days. But what is this but to be an implicit atheist? Doubting that either God sees not his sins; or if he does, that he is not just: for if he believes that God is just, how can he think that God, who for sin so severely punishes others, can love him who still loves to continue in sin? True it is, Christ is merciful; but to whom? Only to those who repent and turn from iniquity in Jacob. (Isa 59:20.) https://gracegems.org/24/practice_of_piety4.htm
Because many nobles and gentlemen are not smitten with present judgment for their outrageous swearing, adultery, drunkenness, oppression, profaning of the Sabbath, and disgraceful neglect of God's worship and service, they begin to doubt of divine providence and justicehttps://gracegems.org/24/practice_of_piety4.htm
Christians, row against the stream of impiety towards heaven, they allow themselves to be carried with the multitude downright to hell, thinking it impossible that God will allow so many to be damnedhttps://gracegems.org/24/practice_of_piety4.htm
Sinful examples are very enticing and encouraging; many have found it so to their eternal undoing. Those that have no ears to hear what you say have many eyes to see what you do. Bad princes make bad subjects, bad masters make bad servants, bad parents make bad children, and bad husbands make bad wives. It is easier for the bad to corrupt the good than for the good to convert the bad. It is easier to run down the hill with company than to run up the hill alone.
It is not so much your loose companions that are your tempters to evil as the devil in and by them. When Peter tried to persuade his Master to avoid sufferings, Christ rebuked the evil spirit that spoke in Peter and said, "Get thee behind me, Satan." Peter was set to work by Satan; therefore Christ calls him by the name of Satan. Those wicked men are instruments in the hand of Satan who propose carnal comforts as a cure for spiritual wounds.