John Trapp on Jeremiah 1:9

Ver. 9. Then the Lord put forth his hand and touched my mouth] This was a very great favour and a ſweet ſettlement to the heſitating Prophet. The like viſible ſign for confirmation was given to Iſaiah, chap. 6, to Ezekiel, chap. 2. and 3. and to John the Divine, Rev. 10. how much are we bound to God for his Word and Sacraments?

Behold I have put my words in thy mouth] And in thy mind alſo; together with good courage for the better uttering of them. Fear not therefore though thou be, as thou objecteſt, infantiſſimus & infirmiſſimus; but go in this my might, and Preach luſtily.