Outdated Advice

One tends to think of advice as timeless. All advice, however, comes with a date stamp except, perhaps, the advice that roots you in values. One likes to think of values as being timeless though one has seen that even value systems come with a timestamp. (I mean, how well does this 'sanctity of human life' gel with 'You are sinless if you just carry out your duty as a Kshatriya and wage war'?