I am just guessing that maybe the sticker meant that you should find a job you enjoy.
I tell my kids in my class that they need to work hard NOW in school, so they don't have to struggle and be miserable later. Bottom line that I tell them is that they should find a job in which they feel like they're getting paid to have fun. If you're happiest when you're around math, then teaching math is like your hobby anyway. If you love law and legality, being a lawyer makes great money and you'd be reading it anyway. If you love religious matters and theology and worship is your life, being a priest is like being paid to do something you find utterly joyful.
For me, I love academics like history, literature, math, geography, languages, etc. so when I go to work each day, I feel like I'm having some fun. Throw in angry and deadbeat, lazy parents plus a broken "no-child left behind" system, and I'm feeling less fun of it by the minute!