Jesus Christ was and is called "the Master Teacher," and rightly so. Jesus gave His life for the cause of saving souls. As you read through the Gospels, sometimes you will see some of the most positive, and loving lessons that can be found...and again, rightly so. God IS love, and His Son was God in the flesh; therefore, Jesus is also love!
So, why shouldn't those who desire to preach God's word only teach about this great love? You know, the kind of love that is everlasting, the kind of love that motivated people like the apostles to drop everything in their lives, "take up their cross," and "follow Him."
Think about it...the more motivating the speech, the more responses of positively energized followers! Wow! Every preacher's desire, right? Well, to some, it is their goal, their desire, and maybe even their own motivation to continue these types of speeches, or what can be loosely called "lessons."
An older preacher recently wrote that one of the major problems in the church today is that there are more men standing in pulpits (or in front of congregants, no matter the method of delivery), that are more concerned with pleasing people, making them feel good, using just stories that tell how "great" things are. They tend to use positive emotions, cheery stories, and lots of smiles in order to "build" their audience, and please their own egos, and ultimately, build their careers.
This is such an incredibly sad thought. Jesus was equally tactful in teaching about the wrath of a God, the eschatology prophecy (end times), and even His own impending death on the cross. He wasn't a "motivational speaker," and neither should any preacher be either.
The Bible is clear about teaching the "whole counsel of God" (Acts 20:27), and the apostle Paul even presents his own woes to any that teach another gospel (Gal 1:8).
There is a very strong need for our churches to be cleansed from these "feel good," "hell doesn't exist," "we're all going to heaven with no requirement of obedience to God's commands," preachers, and the need is urgent.
In the Day of Judgment, there will be a reckoning of all things that were done in the body. There will be those that teach error that will join those who choose to not teach that whole counsel, or even a different gospel. Unfortunately, these very "likeable" preachers/speakers/men will also carry many precious souls with them into an eternity filled with pain, suffering, non-consuming fire, weeping, and gnashing of teeth.
Are you ready to follow a man that will lead souls into such? No? Then, you might want to consider the words, videos, illustrations, ideology, and teachings that might include the "positive side" of heaven, but brushes the very real side of torment, and the wrath of God right under the table.
For the time will come when they will not endure sound doctrine, but according to their own desires, because they have itching ears, they will heap up for themselves teachers; and they will turn their ears away from the truth, and be turned aside to fables. -- 2 Timothy 4:3-4