The saying "the mind is not vessel to be filled ,but a fire to be kindled means a lot to the present situation of education.students should not be forced to acquire knowledge as filling something into an empt should be like a fire that is lit upon something  that grow eventually to is totally different that when a student is forced to aquire knowledge rather than tempted to aquire knowledge
It is actually a simple quote. if you are still below 12th standard or in degree, most parents let their children plan and think for themselves. well they mean that if you dont want to be  a doctor or something which is advisable by experienced adults, you might opt for sports or whatsoever. i think it is advisable to follow this rule because you dont know better of you than your parents and they know what is good and bad for you