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Eisegesis (from Greek εἰς "into" as opposed to exegesis from ἐξηγεῖσθαι "to lead out") is the process of interpreting a text or portion of text in such a way that it introduces one's own presuppositions, agendas, and/or biases into and onto the text. The act is often used to "prove" a pre-held point of concern to the reader and to provide him or her with confirmation bias in accordance with his or her pre-held agenda. Eisegesis is best understood when contrasted with exegesis. While exegesis draws out the meaning from a text in accordance with the context and discover-able meaning of its author, eisegesis occurs when a reader imposes his or her interpretation into and onto the text. As a result, exegesis tends to be objective when employed effectively while eisegesis is regarded as highly subjective.
An individual who practices eisegesis is known as an eisegete, as someone who practices exegesis is known as an exegete. The term "eisegete" is often used in a mildly derogatory fashion.
Although the term exegesis is commonly heard in association with Biblical interpretations, the term is broadly used across literary disciplines.
Eisegesis in Biblical study 
While exegesis attempts to determine the historical context within which a particular verse exists – the so-called "Sitz im Leben" or life setting – eisegetes often neglect this aspect of Biblical study.
In the field of Biblical exegesis scholars take great care to avoid eisegesis. In this field, eisegesis is regarded as "poor exegesis."
While some denominations and scholars denounce Biblical eisegesis, many Christians are known to employ it – albeit inadvertently – as part of their own experiential theology. Modern evangelical scholars accuse liberal Protestants of practicing Biblical eisegesis, while mainline scholars accuse fundamentalists of practicing eisegesis. Roman Catholics and Orthodox Christians say that all Protestants engage in eisegesis, because the Bible can be correctly understood only through the lens of Holy Tradition as handed down by the institutional Church. Dei Verbum: "The living tradition of the whole Church must be taken into account[. A]ll of what has been said about the way of interpreting Scripture is subject finally to the judgment of the Church, which carries out the divine commission and ministry of guarding and interpreting the word of God." Jews, in turn, might assert that Christians practice eisegesis when they read the Old Testament as anticipating Jesus of Nazareth.
Exactly what constitutes eisegesis remains a source of debate among theologians, but most scholars agree about the importance of determining the authorial intentions. Still, to determine the author's intent can often be difficult, especially for books which were written anonymously.
Further reading 
- Exegesis, Biblical Erwin Fahlbusch and Geoffrey William Bromiley, The Encyclopedia of Christianity (Grand Rapids, Mich.; Leiden, Netherlands: Wm. B. Eerdmans; Brill, 1999-2003). 2:237.