For this post, this one scriptural promise can stand on its own. 


"For I will take you from among the nations, gather you out of all countries, and bring you into your own land.  Then I will sprinkle clean water on you, and you shall be clean; I will cleanse you from all your filthiness and from all your idols.  I will give you a new heart and put a new spirit within you; I will take the heart of stone out of your flesh and give you a heart of flesh.  I will put My Spirit within you and cause you to walk in My statutes, and you will keep My judgments and do them."  (Ezekiel 36:24-27 NKJV)