Satan want to destroy you, but God want to save you (John 10:10).
     If Satan is breaking your faith tell Him I have a Good God, whose nature is Goodness and He always does Good. Tell Him He did good in the past, He is doing good in present, then He will surely be good in future. 

Prayer: - Lord You are good God. I saw and taste your goodness in the Past, please do good now in my Life, Family, Job, Finance etc. 

Application: - Write down the things which God done good to you in the past and cry out to God by remembering Him His work done in your life.