The high priests and Sadducees were filled with jealousy because the apostles' teaching was adding more believers to their number. In their jealousy, they had the apostles arrested and put in jail. However, an angel freed the apostles during the night and told them to continue preaching. When the priests discovered the apostles teaching again, they wanted to kill them but did not because of the people. Peter told the priests they must obey God rather than men. To cure jealousy, one must check their love and growth in God, let the Holy Spirit guide them, and apply God's medicine through exercising their freedom in Christ and fighting the sinful nature with God's spirit.