The world, in which we live, is subject to quick transformations resulting from dynamic technical progress. This favours development of mentality, which is apt to accept some negative transformations in morality as natural and unavoidable. Promoters and defenders of such morality often refer to previous changes in the approach to some moral issues, which are sometimes authorized also at the level of official teaching of the Church. The ethics referring to moral law and opposing moral relativism and utilitarianism, emphasizes an unbiased, absolute and unchangeable character of its standards. The impression of apparent changeability of the same may have its sources at the level of application of the same to: 1) human actions, the nature of which has not been known in a sufficiently closely (e.g. excessively lax approach to nicotine addiction or excessively stringent attitude to suicides); 2) actions, the nature of which has changed and, therefore, new other standards should be referred to them (e.g. condemnation of usury and agreeing to interest-bearing bank credits); 3) actions, which are objects of human law erroneously deemed moral law (e.g. the biblical prohibition to consume blood); and finally 4) actions, which are morally neural and are only burdened by some physical evil and, as such, may be admitted due to new circumstances (e.g. use of autopsy).