Grrrr - do I dislike the word 'passionate'? Yes I do, very much. It has become so fashionable over the last few years that it is now a word to be avoided. I blame the cult of TV cookery programmes: everybody in them has to say how passionate they are about cooking. Also every company has to tell us how passionate it is about its particular product or service. So try to find an alternative.
'Dream big' is quite the opposite: so unusual as to make the reader stop and look again. Perhaps you want that, but a more normal use would be 'think big'.