Satan attacks us through accusations. The intent of accusing us is to prove us guilty. He works through other people or he works through you to condemn yourself.

“No weapon that is formed against thee shall prosper; and every tongue [that] shall rise against thee in judgment thou shalt condemn. This [is] the heritage of the servants of the LORD, and their righteousness [is] of me, saith the LORD.” Isaiah 54:17

Jesus took all guilt and shame on the cross to bring us to glory.

“Much more then, having now been justified by His blood, we shall be saved from the wrath of God through Him.” Romans 5:9

If you are continuously feeling guilty, confess your sins and turn from it.

“and these whom He predestined, He also called; and these whom He called, He also justified; and these whom He justified, He also glorified.” Romans 8:30