I believe it is necessary. The reason I say this is our Lord & savior told them throughout the four gospels, told them to repent. I think that repenting in & of itself does not save you. Now that sounds heretectical. I believe that what true heart-felt repentance over ones sins does is prepare the heart (spirit) to properly receive the gospel!! Just like a farmer takes a cultivating disc & pulverises the ground ,before he plants the seeds that he wants to plant.So I believe genuine heart-felt repentance, genuinly feeling sorry over ones sins, prepares our hearts to receive Gods word correctly. In the old-testament they called it breaking up the fallow ground of our heart. I think when the gospel is presented correctly it will automatically cause conviction. Which will lead to repentance & properly receiving the gospel.If you read any of the great revival evangelists , they were not soft on sin like many of todays preachers. They had too much reverential fear of God, to worry about what people thought about them. They were God pleasers, instead of man pleasers. Read anything of Moody's, John G. Lake, Smith wigglesworth, C. Finney's, & the list goes on, & on. Leonard Ravenhill said that if Christ came back today He would not cleanse the pew, He would cleanse the pulpit!! Yes, conviction is for today, repentance is for today, consecration, & sanctification is still for today. God & His Holy Word has not changed, Man's love for self & human selfishness in general, I believe is what causes preachers to compromise. But God's Word shout's across the waves of time REPENT OF YOUR WICKED WAYS ,& receive the gospel. Receive His grace & forgiveness, & lay hold of eternal life that is in Christ. I would recommend to any one he reads this to take the time, & listen to Paris reidhead's sermon" Ten shekel's & a shirt". It opened my eye's year's ago to how much humanism is in the church. Well, enough said for now, God Bless You who read this.
