You will encounter many distractions and many temptations to put your goal aside: The security of a job, a wife who wants kids, whatever. But if you hang in there, always following your vision, I have no doubt you will succeed.
I have not been that wise. Health I have taken for granted. Love I have demanded, perhaps too much and too often. As for money, I have only realized its true worth when I didn't have it.
For me optimism is two lovers walking into the sunset arm in arm. Or maybe into the sunrise - whatever appeals to you.

