"The Bible will keep you from sin and sin will keep you from the Bible." ~ Richard Chorpening
Paige's grandfather dropped this gem on us on a recent Thanksgiving visit to my wife's hometown. He saw it written on the inside cover of his mom's Bible. Her name was Zita. Her sister's name was Zella. They were twins. Those are awesome German names.
If you want to know how to be cleansed, you will need to read and hear about Jesus' perfect life and death and resurrection on your behalf. The Bible is the Word of the Lord that stands forever and this Word is the Good News (Gospel) that was preached to you (1 Peter 1:24-25).
As a regenerated, reborn person adopted as a child of God, you will want to read His Word to hear from Him. You will want to know what He says about life and livelihood in order to conform your life to His good will for you.
If you are in unrepentant sin, you will want to stear clear of the Word. The Gospel is foolishness and godliness is an offense to your current lifestyle.
Our relation to our sin and our relation to the Bible are related.