Its funny how Jesus Christ knows we are so going back to that sin we promised not to go back to...He wasn't surprised to see you on your knees again asking for forgiveness ...He is more aware of howfar sin nature has taken us over than we think...... sometimes he allows us repeat our mistakes for  s to see that leaving a bad habit is not by desire only or good intentions but by the power of the christ at work in us......we pray,we fast, they are an anchor or guide to generating power from the word..... the word is more potent than the the devil's works in us....