Most interesting is the fact that the Torah never precludes lying per se. Rather, it commands us to distance ourselves from falsity (Exodus 23:7). So while there is an explicit law against lying for personal gain (Leviticus 19:11) or as a witness (Exodus20:14), there is no law forbidding lying universally. That is to say, lying for good reason is not only justifiable, but meritorious. Compare this view with the categorical imperative of the great German philosopher Immanuel Kant. On Kant’s view, if lying is forbidden, it is forbidden under any circumstance. But we can imagine circumstances in which lying would be ethical. Suppose a (polite) serial killer came knocking on your door asking if your mother was home so that he could dispatch her. And let assume she was indeed at home. I think everyone would agree that if by lying you could forestall the death of your innocent mother, lying would be the right things to do. Kant would hold you accountable for violating an ethical standard but Judaism would not.
The Talmud (Ketubot 15b) records an early scholarly debate on whether or not it would be justified to offer a compliment to a bride, saying she is beautiful and pious, when she - by any factual standard – is not. Jewish law follows the view that says a compliment in this circumstance is precisely what is warranted. The Talmud (Ta’anit 20b) also tells us how a certain rabbi was condemnable because he truthfully told someone he was ugly. Telling the hurtful truth, it seems, is wrong. That conclusion is supported by another passage (Baba Metzia 23b-24a) that allows a scholar to lie if it means preserving humility, privacy, or protecting others from unfair solicitations. Moreover, there are a number of examples in Rabbinic literature (cf. e.g. Yevamot 65b) where lying to promote peace or create harmony – like complimenting the bride - is encouraged.
Rather than lying – even when it is authorized – some people prefer to be more evasive and simply omit some facts or engage in circumlocutions. This is understandable but entirely unnecessary. To be clear, Judaism does not give a blanket endorsement to lying. But our tradition has come to the pragmatic conclusion that an absolute insistence on truth-telling would not serve every social circumstance.