For the prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost. -2 Peter 1:21

(W)hen has the Holy Ghost ceased to have an influence upon men? We find that still He deals with His ministers and with all His saints. Turn to the Acts, and you will find that the Holy Ghost said, “Separate me Paul and Barnabas for the work.” I never heard of an attribute saying such a thing. The Holy Spirit said to Peter, “Go to the Centurion, and what I have cleansed, that call not thou common.” The Holy Ghost caught away Philip after he had baptized the Eunuch, and carried him away to another place; and the Holy Ghost said to Paul; “Thou shalt not go into that city, but shall turn into another.” Again, that power which we feel every day, who are called to preach-that wondrous spell which makes our lips so potent-that power which gives us thoughts which are like birds from a far-off region, not the natives of our soul-that influence which I sometimes strangely feel, which, if it does not give me poetry and eloquence, gives me a might I never felt before, and lifts me above my fellow-man-that majesty with which He clothes His ministers, till in the midst of the battle they cry aha! like the war-horse of Job, and move themselves like leviathans in the water-that power which gives us might over men, and causes them to sit and listen as if their ears were chained… -that power must come from a person; it must come from the Holy Ghost. ~ C.H. Spurgeon

http://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0004.cfm