How does Shaytaan affect our minds? Shaytaan tries to create insecurities. He makes us feel like we are not good enough the way Allah (swt) created us.
He makes people believe that amulets, statues or others besides Allah (swt) can help. People start believing that these little things affect their outcome in life.
One of the reasons shaytaan proposes these small this is because they lead to major sins over time.