Basically, throughout the Bible Jesus explains time after time that it is not your professions that determine belief but what you do.
This is true...Faith without works is dead according to James. However, you are still overlooking key verses in the Bible.
For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast. For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them. Eph 2:8-10
We are to do good works because of our faith in God and because we are saved, not to be saved.
But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him. Heb 11:6
Clearly we can not please God without faith.
Ps 14:1 The fool hath said in his heart, there is no God.