May I know if you mean by ?Sastras? the age-old, written or unwritten, set and rigid principles of ancient Hindu religious scriptures? …

Have these principles not become
time-barred due to the fast-changing conditions? I don’t think any rigid principle can
stand the test of time.

Yes, the age-old, written or unwritten set principles of the ancient Hindu religious
scriptures are termed ‘Sastras’. But because of this, it need not follow that they should become
time-barred. The fundamental tenets of right living are unchanging. There cannot be any sort of
difference in the fundamentals.
Modifications, alterations and adjustments ar… http://bit.ly/cVUrG9

Is conscience not the mode by which we can listen to the inner Atman?

The pure conscience itself is the “Inner Voice”. But the difficulty in the ordinary man is
that the voice of the lower mind, the voice of the brutal instincts, is often misunderstood as the
voice of conscience. As a result of such misunderstanding, guided by his animal tendencies, he
commits colossal blunders, involving danger to others. It requires a great degree of purity and
calmness of mind to hearken the true Inner Voice.

From „… http://bit.ly/axn4SP