Adam Clarke on Jeremiah 40:14

But Gedaliah the son of Ahikam believed then not - The account given of this man proves him to have been a person of uncommon greatness of soul. Conscious of his own integrity and benevolence, he took the portrait of others from his own mind; and therefore believed evil of no man, because he felt none towards any in his own breast. He may be reproached for being too credulous and confident: but any thing of this kind that may be justly charged against him serves only to show the greatness of his mind. A little soul is ever suspicious, and ready to believe the worst of every person and thing. A great mind acts always on the contrary.