There are people that don't fully understand what the blood of Jesus has already done for them. So, they continue to live as if Jesus never shed his blood. But, he did and he did it for a reason, for you. You see sin calls for punishment and the punishment for sin is death. Now, that doesn't mean just physical death. It includes all the things that came as the result of sin (sickness, depression, poverty, fear, and everything else). Those things are punishment for sin. Now, the scripture says God is the judge of all the earth and he's a just judge. So, if you sin you are due punishment. But, that's where the blood comes in. Jesus took all of your punishment for you to be free of it. In Isaiah 53:4,5 it says, "Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted. But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed." See, he took what was due you.
Let me paint this picture for you, let's say a person commits a crime and the judge sentences him to 15 years, after those 15 years he goes free from that punishment and he cannot be punished again for that crime. That's like what Jesus did, the sentence for sin is death and your sin was put on him so he took your punishment for you to be free of it. In 1Peter 2:24 it says, "Who his own self bare our sins in his own body on the tree, that we, being dead to sin, should live unto righteousness: by whose stripes ye were healed." Well, if your sins were put on him then so was your punishment. That's why it says, "By whose stripes ye were healed". Notice that's past tense because the debt has been paid by his blood. Let me give you an example, say you get a bill in the mail for 300 dollars, that's what you owe, and I go and pay for what you owe then the debt is paid. But, you still have the bill in your hand, now you can either accept what I did and thank me for it or you can keep living like you owe or have the bill. The debt has been paid for you to be free of that sickness, that depression, that fear, that poverty. But, you may have some trace that the debt has not been paid that's why this is a faith walk. You can either put your faith in what the Bible says Jesus did or you can put your faith in what you see. Accept what Jesus did for you and let the redeemed of the Lord say so and hold on to that confession of faith (Psalm 107:2, Hebrews 10:23). You overcome by the blood of the Lamb and by the word of your testimony (Revelation 12:11).