For every man that is mad, and maketh himself a prophet - Mad, משגע meshugga, in ecstatic rapture; such as appeared in the prophets, whether true or false, when under the influence, the one of God, the other of a demon. See 2 Kings 9:11; Hosea 9:7.

Jeremiah 29:25 "Thus says the LORD of hosts, the God of Israel, 'Because you have sent letters in your own name to all the people who are in Jerusalem, and to Zephaniah the son of Maaseiah, the priest, and to all the priests, saying,

The Secret of Effectual Prayer
"What things soever ye desire, when ye pray, believe that ye have received them, and ye shall have them."--MARK xi. 24. Here we have a summary of the teaching of our Lord Jesus on prayer. Nothing will so much help to convince us of the sin of our remissness in prayer, to discover its causes, and to give us courage to expect entire deliverance, as the careful study and then the believing acceptance of that teaching. The more heartily we enter into the mind of our blessed Lord, and set ourselves simply …
Andrew Murray—The Ministry of Intercession

Jeremiah
The interest of the book of Jeremiah is unique. On the one hand, it is our most reliable and elaborate source for the long period of history which it covers; on the other, it presents us with prophecy in its most intensely human phase, manifesting itself through a strangely attractive personality that was subject to like doubts and passions with ourselves. At his call, in 626 B.C., he was young and inexperienced, i. 6, so that he cannot have been born earlier than 650. The political and religious …
John Edgar McFadyen—Introduction to the Old Testament