The preachers preach salvation just as well as opponents. I am saying they are overestimating the Christian, saying the real Christian wouldn't lose faith ever to the point of him giving back God's gift of salvation. The supporter of Unconditional Eternal Security also has a different view of God than the Bible tells us. He's totally loving and forgiving, but also is holy, just, and wrathful towards those who to continually go against his will. Above all God respects man's freewill.
Man is a very fickle being.
Even if he does want to obey with all of his heart, he still has this weak body. The spirit truly is ready, but the flesh is weak. These verses indicate the person is already a believer or Christian.