2 Corinthians 11:14-15

14 And no wonder! Even Satan disguises himself as an angel of light.
15 So it is not strange if his ministers also disguise themselves as ministers of righteousness. Their end will match their deeds.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.