I have talked with people that have no assurance of sins forgiven. They want to feel saved before they're willing to commit themselves to Christ. But I believe that the only ones whom God actually witnesses by His Spirit are born of Him, are the people whether they say it or not, that come to Jesus Christ and say something like this: 'Lord Jesus, I'm gonna obey You and love You and serve You and do what You want me to do as long as I live even if I go to hell at the end of the road simply because You are worthy to be loved, obeyed and served. And I'm not trying to make a deal with You.'
