The goal of Syaitan is to dirty yourself or to make yourself feel dirty to the point where you have lost all of your self-control. He strives to dirty yourself to the point where you can no longer face Allah, thinking that you can never be forgiven.
He strives to break you down, bit by bit to the point where you feel numb to the sins that you have committed, till you stop asking for forgiven from the Most Merciful.
He reasons with you, telling you that your bad deeds are justified. He tears you apart, slowly.
He has promised to attack from the front, back, left and right and promised not to stop till the Day of Judgement.
Therefore, we have to always be on guard.
Sometimes we fail and fall victim to his influences but we must learn to stand back up, every time, vowing to strengthen our will.
May we be protected from the Accursed and the enemies of Allah SWT.