Sin deceives, therefore it is needful to remind ourselves daily about the warnings in God's Word and remain watchful. We cannot afford to be careless with our Christian life because many in the past and in contemporary times have been and are still being deceived out of the narrow way. Be not deceived: the wages of sin is death and whatsoever a man sows that shall he also reap. 

When God saved Israel from Egyptian bondage and captivity, He hedged them in, providing a cover of protection. But every time they rejected God and worshipped strange gods, the hedge was broken and their enemies pursued and overpowered them. However, each time they repented and returned unto the Lord, He delivered them. That was a dangerous pattern which the believers should not imitate. You should never take the grace of God for granted.