You must be in fellowship prior to your Bible study, so that the spiritual information you receive can become a source, of blessing to your soul and produce spiritual growth.
18 For [gar] I know [eido] that [hoti] in [en] me [emoi] (that is [toutesti], in [en] my [mou] flesh [sarx],) dwelleth [oikeo] no [ou] good thing [agathos]: for [gar] to will [thelo] is present [parakeimai] with me [moi]; but [de] how to perform [katergazomai] that which is good [kalos] I find [heurisko] not [ou]. KJV-Interlinear
18 For I know that nothing good dwells in me, that is, in my flesh. For I have the desire to do what is right, but not the ability to carry it out. ESV
Now remember that Paul is a Christian. He is a believer in Jesus Christ. But he is also describing that the sin nature remains within him, despite his Christian status.
Just because a person has believed in Christ and is therefore saved, does not mean the sin nature has become somehow nonexistent within the body.
Christians are just as easily susceptible to sin after salvation, as they were before salvation. Your volition decides which way you choose to lean.
The sin nature leaves an inherent weakness within the individual, that is impossible to overcome, on ones own.
But this should also make it clear, that self-perfection within the individual is also an impossibility.
You cannot eat the right things, you cannot exercise the right way, you cannot meditate in some certain way, as a means to ascending yourself from imperfection to perfection.
There is only one way to gain perfection in ones life, and that begins with faith in Christ for salvation, and learning Bible doctrine for spiritual muscle.
Study [by instruction],
to show thyself approved [spiritually mature]
unto God,
a workman [student]
that need not be ashamed [ignorant],
rightly dividing [learning, understanding, discerning]
the word of truth [Bible doctrine].
These studies, are a part of the massive daily study web site at DailyBibeStudy.Org, that is easily accessible, and are written, so that you can come to Christ if you have not done so already, and therefore not be lost forever.
And if you have already believed in Christ, then these studies are written so you can learn and understand and grow in your spiritual life, so that you can come to the full knowledge of Christ, so that you can fulfill your meaning and purpose in life as God intended for you, and so you can qualify for a phenomenal eternal reward which you will have forever.
To ignore this opportunity to pursue a daily study means you will be incomplete, unfulfilled and you will lose out, big time.
The Daily Bible Study is online, making it possible as never before in all of human history, to advance in ones relationship with God, through Christ, and to complete yourself beyond your imagination.
But you have to decide to make that commitment. No one else can study for you. You have to do that yourself.