When I am praised, the praisers do not make me as their example. For they praise not as lowly creatures, but a judge whose own pros and cons are always shielded from the world.
It is the same, when they read the Bible. They read it as the judge judging the Bible, while in reality, it is just the reverse, that when they read the Bible, they, not the Bible, are being judged - by the Bible.
Therefore, when we praise others, we do not praise vainly, but we make their example our mentor, our personal mentor.
If one only praises others and makes it not his life's example, of that which he praises, his praise is vain and there is no faithfulness found in his mouth.