1 There is a great question about Lying, which often arises in the midst of our every day business, and gives us much trouble, that we may not either rashly call that a lie which is not such, or decide that it is sometimes right to tell a lie, that is, a kind of honest, well-meant, charitable lie. This question we will painfully discuss by seeking with them that seek: whether to any good purpose, we need not take upon ourselves to affirm, for the attentive reader will sufficiently gather from the course of the discussion.
It is, indeed, very full of dark corners, and has many cavern-like windings, whereby it oft eludes the eagerness of the seeker; so that at one moment what was found seems to slip out of one's hands, and anon comes to light again, and then is once more lost to sight. At last, however, the chase will bear down more surely, and will overtake our sentence. Wherein if there is any error, yet as Truth is that which sets free from all error, and Falsehood that which entangles in all error, one never errs more safely, methinks, than when one errs by too much loving the truth, and too much rejecting of falsehood.
For they who find great fault say it is too much, whereas perhaps Truth would say after all, it is not yet enough. But whoso readest, you will do well to find no fault until you have read the whole; so will you have less fault to find. Eloquence you must not look for: we have been intent upon things, and upon dispatch in putting out of hand a matter which nearly concerns our every day life, and therefore have had small pains, or almost none, to bestow upon words.
Source: On Lying (New Advent)