Faith/Repentance
Independence or dependance on anything but God = sin
dependence upon God= faith/trust
Faith is the belief in and trusting in Jesus Christ as Lord and Savior/ The Son of God.
Repentance is the act of turning from independence or dependance upon whateverit may be to dependence upon Christ alone as Lord and Savior.
To say you have faith and no dependence upon Christ is false faith
The act of having faith in Christ is turning from self or whatever else to Christ in trust (aka repentance). this is a lifelong act granted by the Spirit of God.
repentance isnt trying to sort out all the sin in your life to be acceptable to Christ but rather the act of turning to Him in faith (which also begins practicing righteousness). So true faith and trust in Christ will also desire to stop known disobedience, but will never completely be sinless of course.
So repentance without faith is not true and faith without repentance is not true, but both of them joined together as 'one' seems to be true. Therefore if one says I trust in Christ as Savior and says He is not Lord of my life, then I would be worried. It is clear when one encounters Jesus and wants to be a disciple that they must forsake all, lose their lives, sell all they have, and truly want to do so for His sake. In other words they submit to His Lordship because they see the great worth of His Kingdom, and again I quote Mathew 13:44
Thats my two cents