Came across this cracker of a quote in Matthew Henry when doing some reading for preaching on Zechariah.
"Ministers are dying men and live not forever in this world. They are to look upon themselves as such and to preach accordingly, as those that must be silenced shortly, and know not which sermon may be the last. People are to look upon them as such, and to hear accordingly, as those that yet a little while have the light with them, that they may walk and work while they have the light. Oh that this weighty consideration had its due weight given it, that we are dying ministers dealing with dying people about the concerns of immortal souls and an awful eternity, which both they and we are standing upon the brink of."
Matthew Henry, Volume 4 p1402, MacDonald