What does this mean to me?
This quote means to me that you need to be confident, if you want to be a scientist, be a scientist when you grow up. Never give up, don't doubt yourself. You will have to put some effort but it will happen, be courageous. You sometimes have to challenge yourself to pursued to your future it is not just going to happen like that. Just because you see something it difficult does not mean you have to give up.