The Lord Jesus Christ warns in Matthew 7:22-23:
'Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
Who does many wonderful works in the name of Christ? Christians do. So, if you identify yourself as a Christian, don't assume that you are saved: be prudent: make sure that you understand what the scriptures say you must to to have all your sins forgiven and be justified by God.
You see no cause for concern? If any man be ignorant, let him be ignorant.
'Have ye not read?'
Salvation from hell
Your bible. Is it the word of God?
Establishment in the faith