"accidental truths of history can never become the proof of necessary truths of reason." Kierkegaard points out that he also said, "contingent truths of history can never become the demonstrations of necessary truths of reason." Kierkegaard liked Lessing because he "had a most uncommon gift of explaining what he himself had understood. With that he stopped; in our day people go further and explain more than they themselves have understood." Kierkegaard has Don Juan in Either/Or escort young girls "all in the dangerous age of being neither grown-up nor children" to "the other side of the ditch of life" as he, himself, "dances over the abyss" only to "instantly sink down into the depths." He has Don Juan "preach the gospel of pleasure" to Elvira and seduces her from the convent and wonders if there is a priest who can "preach the gospel of repentance and remorse" with the same power as Don Juan preached his gospel. Both Lessing and Kierkegaard are discussing the agency one might use to base one's faith upon. Does history provide all the proofs necessary to cross that "ugly, broad ditch"? Or is there "no direct and immediate transition to Christianity". Does one become a Christian "in the fulness of time" as Kierkegaard puts it or is "there only one proof of spirit and that is the spirit’s proof within oneself. Whoever demands something else may get proofs in superabundance, but he is already characterized at spiritless." He also writes about this in his Concluding Unscientific Postscript: The implication of taking a leap of faith can, depending on the context, carry positive or negative connotations, as some feel it is a virtue to be able to believe in something without evidence while others feel it is foolishness. It is a hotly contested theological and philosophical concept. For instance, the association between "blind faith" and religion is disputed by those with deistic principles who argue that reason and logic, rather than revelation or tradition, should be the basis of the belief "that God has existed in human form, was born and grew up". Jesus is the "paradox", the "absolute paradox". When Christianity becomes a scholarly enterprise one tends to "reflect oneself into Christianity" but Kierkegaard says, one should "reflect oneself out of something else and become, more and more simply, a Christian." Kierkegaard was concerned that individuals would spend all their lives trying to define Christianity,