Therefore, when you say 'farewell,' the word falls upon my ears with double meaning.

We are friends--our friendship is sanctified by the dead presence of one whom we both loved, in different ways; therefore you will take in good part what I now say to you.

You know, you cannot disguise from yourself that the science I study is fraught with terrible truth and marvellous discoveries; the theories I deduce from it you disbelieve, because you are nearly a materialist.

I say NEARLY--not quite.

That 'not quite' makes me love you, Ivan: I would save the small bright spark that flickers within you from both escape and extinction.