Before we look into the impact, what, first, is eschatology? Eschatology, according to the WordWeb, is defined as the branch of theology that is concerned with such final things as death and Last Judgment; Heaven and Hell; the ultimate destiny of humankind. Concisely, it concerns the 2nd coming of Christ. Most forefathers and foremothers of Pentecostalism, deriving their doctrine from a fundamentalist interpretation of the Bible, declared themselves to be premillenialists, who expected a second advent of Christ to occur prior to the establishment of a one-thousand-year reign of Jesus Christ described in Revelations 20:1-7. For many Pentecostals, this belief is further elaborated as pretribulation, which assures believers that the rapture will spare them of the terror and destruction to fill the earth before the promised thousand-year reign of Christ. With this in mind, we understand its impact on the movement.

According to Pentecostal theologian Mrs. Rebecca Jaichandran, ‘spirituality’ is relatively a new term to many Pentecostal believers who have all the while been more preoccupied with the whole concept of ‘being spiritual’. She defines spirituality as giving ourselves to God through both our beliefs and emotional attitudes, which ultimately influences our actions and values. But what then is "Pentecostal Spirituality"? According to Richard Lovelace , Pentecostal Spirituality emphasizes the spirituality that grows by means of the work of the Holy Spirit.

How is the condition of the Pentecostal spirituality today, one might ask. In order to answer this, one must do a comparison in certain key areas of Pentecostalism then and now. These areas, according to the Dictionary of Pentecostal and Charismatic Movements, are the implicit values that govern the Pentecostal spirituality. These must be compared, dissected, and analyzed to determine the condition of the current spirituality. Let us now analyze two very important values or areas:

The utmost importance of individual experience.
Please, do not jump to conclusions before reading to the end yet. By experience, in the positive sense, one would say that a Pentecostal is not satisfied until he or she has an experience with God. It is not even enough to hear others having an experience with God but they individually want to experience the reality of God. This actually is a good thing. But sadly, these days, the danger has finally surfaced. In some cases, beliefs or faith have become secondary to experience. It is like, now, in order for their beliefs to be true, they must first experience it first. Faith is slowly disappearing. To make things worse, sometimes, these experienced are ‘manufactured’.

Worship
Pentecostals believe that worship is a mean for an encounter with God. According to their beliefs, God will come and meet His people. All they can do is only to prepare and wait for God’s actions among them and then respond to the flow of the Spirit. Usually in a worship service, one main component is the music. The music of a Pentecostal song service, usually called the worship service, is often intended usher the congregation into the presence of God. The danger today (which I believe already many Pentecostals have fallen into) is that they get so used to the music being associated with the music for the ‘experience of worship’ that many of them have lost the true meaning of worship. It has become more of self-satisfaction than God-centered worship. In some cases, the ‘experience of worship’ is now place more superior to the exposition of the Word. We cannot live without the Word of God (as Jesus said in Matt 4:4, “Man shall not live by bread alone, but by every word that comes from the mouth of God.”) We cannot just shove away with the Word of God, deeming it as not as important when compared to the ‘experience of worship’.

Conclusion
I think many Pentecostals today have swayed away from the initial and core values of our Christian and Pentecostal faith. We must go back to the origin, where it was all about God and not us. If the Pentecostal spirituality is to be vibrant and healthy, then, God must be made the center. That is what I think. Again, these are just my observations, thoughts and opinions.