I Am Tempted

I have resolved to be pure from within, and then was almost immediately tempted, and I don't know if I can be truly pure from within, sure I can walk away from temptation no problem, but I feel things that shouldn't be there....And here I am thinking about my purity from within, it's what I want to be, innocent and beautiful in the sight of God, but I know that there will be times when I am tempted again and again, and I know that I will always want to make the right choice and walk away. I am asking God to forgive me, and by faith I accept His forgiveness and go on about my day like it never happened.