Proving Quotes
The method of successive approximations is often applied to proving existence of solutions to various classes of functional equations; moreover, the proof of convergence of these approximations leans on the fact that the equation under study may be majorised by another equation of a simple kind. Similar proofs may be encountered in the theory of infinitely many simultaneous linear equations and in the theory of integral and differential equations. Consideration of semiordered spaces and operations between them enables us to easily develop a complete theory of such functional equations in abstract form.
Leonid Kantorovich
Modern man may assert that he can dispense with them, and he may bolster his opinion by insisting that there is no scientific evidence of their truth. But since we are dealing with invisible and unknowable things (for God is beyond human understanding, and there is no mean of proving immortality), why should we bother with evidence?
Carl Jung
...when a society is reaching its end, in the last couple of centuries you have... a misplacement of satisfactions. You find your emotional satisfaction in making a lot of money... or in proving to the poor, half-naked people in Southeast Asia that you can kill them in large numbers.
Carroll Quigley
There have been men before ... who got so interested in proving the existence of God that they came to care nothing for God himself... as if the good Lord had nothing to do but to exist. There have been some who were so preoccupied with spreading Christianity that they never gave a thought to Christ.
C. S. Lewis