This is an important topic for Christians, as it's crucial to our Salvation. To continue in sin knowingly certainly results in a loss of one's Salvation. We must forsake that sin(s) and do our first works over by being cleansed in the blood of Jesus for the remission of sin. If we cling to that sin(s), we are fallen from grace and are considered backsliders.
Romans 6
[1] What shall we say then? Shall we continue in sin, that grace may abound?
[2] God forbid. How shall we, that are dead to sin, live any longer therein?
[3] Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death?
[4] Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.
[12] Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof.
[13] Neither yield ye your members as instruments of unrighteousness unto sin: but yield yourselves unto God, as those that are alive from the dead, and your members as instruments of righteousness unto God.
[14] For sin shall not have dominion over you: for ye are not under the law, but under grace. (KJV)
Romans 6
[1] What shall we say then? Shall we continue in sin, that grace may abound?
[2] God forbid. How shall we, that are dead to sin, live any longer therein?
[3] Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death?
[4] Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.
[12] Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof.
[13] Neither yield ye your members as instruments of unrighteousness unto sin: but yield yourselves unto God, as those that are alive from the dead, and your members as instruments of righteousness unto God.
[14] For sin shall not have dominion over you: for ye are not under the law, but under grace. (KJV)