The entire world is antagonistic to God because of the spirit generated by an unseen ruler. Our Christian duty is to stay awake and keep our guard up.
Laodiceanism is the attitude that dominates the end time. It is a subtle form of worldliness that has infected the church, and Christ warns against it strongly.
We must avoid following the negative examples of our forbears. We have been enlisted into spiritual warfare on three fronts: the heart, the world, and Satan.
The Christian life is a constant battle against our own human natures, this evil world, and spiritual foes who do not want to see us inherit the Kingdom.
God emphasizes Ecclesiastes during the Feast of Tabernacles to show the result of doing whatever our human heart leads us to do. The physical cannot satisfy.
Like Jesus and other heroes of faith, we need to look beyond the present to the long term effects of the trials and tests we go though, seeing their value.