Struggling

Why is it so hard to stay on the narrow path? It is as if I feel like demons are dragging me down while I struggle to stand. It is a struggle that keeps on going. Satan gets a foothold in my life and controls an area, then his foot slips as God holds me up. Then Satan regains his foothold. It is such a struggle. I want to do good but my flesh wants to fulfill short term desires. "The spirit is willing but the flesh is weak." (Bible) I thought I had won for a while. But Satan keeps on attacking in the same spot while it is still weak from the last attack. God deliever me!