Charles H. Spurgeon on Psalms 39:1

No lesson so hard to be learned of us here, as the wise and discreet government of the tongue. David promised a singular care of this, I said, I will take heed, etc. Socrates reports of one Pambo, an honest, well meaning man, who came to his friend, desiring him to teach him one of David's Psalms, he read to him this verse. He answered: this one verse is enough, if I learn it well. Nineteen years after, he said, in all that time, he had hardly learned that one verse. Samuel Page.