Исходное сообщение
The sky is the limit" when there is almost no limit to how far you can go in what you are doing. Example: "For people who work hard at this company, the sky's the limit." You feel very optimistic (positive, hopeful) about your future because there are so many possibilities when "the sky's the limit." Example: "After I graduate from business school, the sky's the limit!"
Or "After doing PhD at Harvard, the sky's limit"

g_ashtray, sorry asstray, ooops assaholatray:)
Happy Hannukah, Noah's ark