If you have not read the first Promise study on Mathew, you need to read it before you go on. I am going to repeat this each time as it is important to know how and when we can expect to receive the promises in the Bible. So please go back and read the ones from Mathew.
Mark 11:22-24 "Have faith in God. For assuredly I say to you, whoever says to this mountain, 'be removed and be cast into the sea,' and does not doubt in his heart but believes that those things he says will be done, he will have whatever he says. Therefore I say to you whatever things you ask when you pray, believe that you receive them, and you will have them."
A lot of people think that the mountain is a literal mountain, but when studying it, I believe it is speaking of mountains of sin, because He does say that He will cast our sins in the depths of the sea and remember them no more. That is a wonderful promise. We must confess them and repent with sorrow over them because we have wounded our Savior, when He has done so much for us, and He has promised whatever we ask when we pray, we must believe that we receive our request and He will do it. We can start over each day with a clean slate and leave our past in the depths of the sea. You will find that promise in Micah :1:9 and Hebrews 8:12.
Have you every thought that you can start with a new life, tomorrow? If God doesn't want to remember our sins, then why should we dwell upon them and let Satan keep hammering us with them. It's his way of discouraging us and God doesn't want us to listen to him and become overwhelmed by our past. So let's start a new life tomorrow and if we do fall He has the answer for that too, in 1 John 1:9 "If we confess our sins, He is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness."
So dear Friend, take God at His word and believe His precious promises and start your life anew each day and God will see you through. Grandma Joan