First, nobody in Russia believes that the sanctions will be lifted.  Nobody.  Of course, all the Russian politicians say that sanctions are wrong and not conducive to progress, but these are statements for external consumption.  In interviews for the Russian media or on talk shows, there is a consensus that sanctions will never be lifted no matter what Russia does.

Second, nobody in Russia believes that sanctions are a reaction to Crimea or to the Russian involvement in the Donbass.  Nobody.  There is a consensus that the Russian policy towards Crimea and the Donbass are not a cause, but a pretext for the sanctions.  The real cause of the sanctions is unanimously identified as what the Russians called the "process of sovereignization", i.e. the fact that Russia is back, powerful and rich, and that she dares openly defy and disobey the "Axis of Kindness".

Third, there is a consensus in Russia that the correct response to the sanctions is double: a) an external realignment of the Russian economy away from the West and b) internal reforms which will make Russia less dependent on oil exports and on the imports of various goods and technologies.