From I John, the Bible tells us "That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, of the Word of life." is a true testimony of the living and resurrected Christ. In the beginning, Jesus was here. His disciples walked, observed and did not just know Jesus, but experienced Him.
There is a hard truth that occurs when we are saved. The truth that our old sinful nature is not eradicated. We do still have the old nature of the flesh, but when we are saved, we also take on a new nature of Christ. We will continue to have a war going on inside. Every person that is called a "good christian" will be warring with the spirit and still have trouble with the flesh. Even though we are Gods children and are saved by grace, we have this warfare going on.
So how can we stress the assurance of our salvation? When we are in fellowship with God, we KNOW that we are saved. Men will always be sinners, but that debt was paid for all by Jesus. We can know that we have eternal life and not base this truth on emotions. The only way we are saved is because the Bible says we are! We serve a God who can not lie. God loves us when we are unlovable. He is faithful to forgive us when we confess our sins.
Know that when God saves us, He wants to fellowship with us. How can a God who created everything out of nothing leave us comfortless? When you think about your life, are you simply tipping your hat or are you serving the Lord? Do you only seek His help when you are in trouble and your back is against the wall? Don't save your fellowship for when things aren't going well. There is a holy fellowship in confession to God and not man. When we confess our sins to God, He is faithful to forgive us.
Be thankful that God is so faithful. We are going to have problems in our walks of life, but when we have a daily cleansing, we can have forgiveness. Confess all your sins, for there can be no forgiveness without this confession. Our God is faithful and just, and knows things that are going on in our lives that we would be so embarrassed of just the thought of anyone else knowing. But God does know. God always knows our exact thought. But we can't walk in the darkness and have fellowship with the one who is the light. Confess your sins to the Lord. How long has is been since you had fellowship and felt clean?
"If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness." I John 1:9