Take care not to be deceived by wolves dressed as sheep. They look like you and say things that sound right but...Hebrews 3:12-13 ESV:
Take care, brothers [and sisters], lest there be in any of you an evil, unbelieving heart, leading you to fall away from the living God. But exhort one another every day, as long as it is called “today,” that none of you may be hardened by the deceitfulness of sin. For we have come to share in Christ, if indeed we hold our original confidence firm to the end.