The decoding formulae are:

a = a ' + 15b ' mod 26 b = 21b ' mod 26

The message is coded as follows: xxxxxxxx xxxxxx xxxxxx xxxxxx xxxxxx xxxxxx xxxxxx xxxxxx xxxxxx xxxxxx xxxxxx xxxxxx P ih av en os pe ci al gi ft ia mo (a,b) 8 7 0 21 4 13 14 18 15 4 2 8 0 11 6 8 5 19 8 0 12 14 (a ' ,b ' ) 3 9 11 1 17 13 16 12 1 20 0 14 7 3 4 14 10 8 0 2 18 C dj lb rn qm bu ao hd eo kr ia cs P nl yp as si on at el yc ur io us (a,b) 13 11 24 15 0 18 18 8 14 13 0 19 4 11 24 2 20 17 8 14 20 18 (a ' ,b ' ) 20 3 17 23 2 12 16 14 1 13 5 17 11 3 4 10 19 7 24 18 22 12 C ud rx cm qo bn fr ld ek th ys wm

The decoded message is another quotation from Enstein, this about himself as a mathematician:

'I have no special gift. I am only passionately curious'.

xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx a b c d e f g h i j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25