The devil can make us feel like we are doing the right thing in Jesus' name when our worship and service to God are in vain. Paul's fear for the Corinthian church was that their minds be corrupted from the simplicity and the purity of Christ. (See 2 Corinthians 11:3) It seems that his fears were well-founded. Just as "the serpent in his craftiness deceived Eve," Corinth was seduced by Apollos, who appeared as a minister of righteousness to be used by Satan. The church soon fell into apostasy and despite Paul's valiant efforts, it never recovered.