It is perilous to separate thinking rightly from acting rightly. He is already half false who speculates on truth and does not do it. Truth is given, not to be contemplated, but to be done. Life is an action — not a thought. And the penalty paid by him who speculates on truth, is that by degrees the very truth he holds becomes a falsehood.

P. 606. - Dictionary of Burning Words of Brilliant Writers (1895)