Charlotte Bronte draws into question the Christian hypocrite with Mrs. Reed and Mr. Brockleburst as well as the unhappy hypocritical relgious zealout in the person of St. John Rivers who wishes to marry Jane so that he can have an assistant in his missionary work.
Jane Eyre deals with such standard Biblical topics as mercy, forgiveness, compassionate love, pride (and its antidote, humility), and treating others as one wishes to be treated (the so-called "Golden Rule"). Ultimately, Jane is a far better representative of Christianity than Reverend Brocklehurst, despite his official position within the church.
Reverend Brocklehurst subjects poor Jane to an inquisition about her commitment to reading the Bible! It appears that she does indeed know her Bible but prefers some bits to others. For example she likes the Old Testament better than the new, and she doesn't seem to like the psalms.
I think that Jane Eyre deals with Biblical themes and ideas since if we refer to onomastics, the word Thornfield is meaningful i.e. it is a clear reference to the thorn crown of Jesus. Furthermore Jane learns how to give and receive love (an important topic here) thanks to Miss Temple who follows the principles of the New Testament, these principles being adapted to our dimension. But another thing can draw our attention : Helen Burns is presented as a Christ-like figure, symbol of purity. Of course the religious dimension is largely developed throughout the whole novel and more importantly we can notice that this dimension is two-fold i.e. Mr. Brocklehurst represents the repressive aspect of religion whereas Miss Temple wants to convey a message of love. Thereby I think that it is important to highlight these two different facets of religion.
In what ways is forgiveness shown in Jane Eyre?