Ambition
Don't let ambition kill your wonder.
It's hard for these both to exist at the same time — ambition chases ends while wonder revels in the means.
But it's not impossible. Make time for wonder; come back to it at night, after a long day spent chasing your ambitions. When you feel it, hold wonder tighter than ambition.
If anything is more illusory than the other, it is ambition — its eyes only on a far-off payday. But wonder is real and tangible — it is here today.
Keep this in mind and you won't end up losing yourself as you chase your ambitions.