Any one thing in the creation is suffiocient to demonstrate a Providence to a humble and grateful mind. Epictetus
I have resolved to demonstrate by a certain and undoubted course of argument, or to deduce from the very condition of human nature, not what is new and unheard of, but only such things as agree best with practice. Baruch Spinoza
Wherever Mathematics is mixed up with anything, which is outside its field, you will find attempts to demonstrate these merely conventional propositions a priori, and it will be your task to find out the false deduction in each case. Carl Gustav Jacob Jacobi
Every child has an enormous drive to demonstrate competence. Buckminster Fuller
Those who reveal information the law makes it a crime to reveal, when doing so is the only way to demonstrate to the public that powerful officials are acting wrongfully or deceitfully. Glenn Greenwald
A spacious ground is the right place to demonstrate one's skill in wrestling. Nigerian Proverb