All of that is true,’ ...

All of that is true,’ responded Don Quixote, ‘but we cannot all be friars, and God brings His children to heaven by many paths: chivalry is a religion, and there are sainted knights in Glory.’ Yes,’ responded Sancho, ‘but I’ve heard that there are more friars in heaven than knights errant.’ That is true,’ responded Don Quixote, ‘because the number of religious is greater than the number of knights.’ There are many who are errant,’ said Sancho. Many,’ responded Don Quixote, ‘but few who deserve to be called knights.
All of that is true,’ responded Don Quixote, ‘but we cannot all be friars, and God brings His children to heaven by many paths: chivalry is a religion, and there are sainted knights in Glory.’ Yes,’ responded Sancho, ‘but I’ve heard that there are more friars in heaven than knights errant.’ That is true,’ responded Don Quixote, ‘because the number of religious is greater than the number of knights.’ There are many who are errant,’ said Sancho. Many,’ responded Don Quixote, ‘but few who deserve to be called knights.

Quotes from the same author

Be slow of tongue and quick of eye.
Those who will play with cats must expect to be scratched.
I believe there's no proverb but what is true; they are all so many sentences and maxims drawn from experience, the universal mother of sciences.
Liberty, as well as honor, man ought to preserve at the hazard of his life, for without it life is insupportable
There are but few proverbial sayings that are not true, for they are all drawn from experience itself, which is the mother of all sciences.