Fragile as reason is and limited as law is as the institutionalised medium of reason, that's all we have between us and the tyranny of mere will and the cruelty of unbridled, undisciplined feelings. - Felix Frankfurter
Work is an anchor; it prevents the undisciplined minds drifting to the past. It keeps them in the present time. - Mehmet Murat ildan
An army of disciplined sheep is greater than an army of undisciplined wolves. - Matshona Dhliwayo
Study hard what interests you the most in the most undisciplined, irreverent and original manner possible. - Richard Feynman
There is nothing so disobedient as an undisciplined mind, and there is nothing so obedient as a disciplined mind. - Gautama Buddha