The wise are instructed by reason, average minds by experience, the stupid by necessity and the brute by instinct. – Marcus Tullius Cicero

 

 

I've studied now Philosophy
And Jurisprudence, Medicine,
And even, alas! Theology
All through and through with ardour keen!
Here now I stand, poor fool, and see
I'm just as wise as formerly. – Johann Wolfgang von Goethe

 

 

Those who can, do; those who can't, teach. – George Bernard Shaw