God sent His Son into the world not to judge the world, but to save the world through Him. John 3 17

Its a lie to tell an unbeliever that when they get saved,  everything will be ok. Christians struggle with sin tendencies, its called iniquity, but we don't have to get 'stuck' with our sin. Eph.2 states,  " who the Son sets free is free indeed! " So, how do we get away from our sin tendencies and gain victory?
RENEW OUR MINDS! Sin tendencies can continue to push us around if we don't nourish our minds with the Word.
Remember, if you starve something , it will die. Starve that sin tendency and replace thoughts , emotions, actions, with the Word of God. That is what it is there for.