The gospel has the power to beget or to regenerate spiritual life (James 1:18). In the Parable of the Sower (Luke 8:5-8, 11-15) the word of God is likened unto a "seed" that is sown in different kinds of soils (v. 11). Peter said that his readers had "been born again, not of corruptible seed but incorruptible, through the word of God which lives and abides forever" (1 Pet. 1:23).
It is very fitting that the gospel (God's power to beget or to regenerate spiritual life) is likened unto a seed. A seed carries genetic information. When it is planted and germinates, new life springs forth and grows. The same thing is true with the gospel. When the gospel is accepted into one's heart, it will result in a new spiritual life.
On the third day of creation, God established the fact that plants will always reproduce after their own kind. "Then God said, 'Let the earth bring forth grass, the herb that yields seed, and the fruit tree that yields fruit according to its kind, whose seed is in itself, on the earth;' and it was so. And the earth brought forth grass, the herb that yields seed according to its kind, and the tree that yields fruit, whose seed is in itself according to its kind. And God saw that it was good" (Gen. 1:11-12). The plant that grows from a seed will always be in accordance with the genetic information that is found in that seed. If a farmer plants corn, he will get corn. If he plants watermelons, he will get watermelons. Etc.
The passing of time, even great amounts of time, does not alter this fact. For example, the seeds of an extinct date palm plant were discovered in an excavation of Masada (the desert fortress where, in 73 AD, ancient Jewish rebels chose suicide over capture by the Roman army). Because of the historical event that took place at this site, these seeds were known to be 2,000 years old. In 2005, some scientists planted these seeds. They germinated and date palm saplings began to grow. The seeds produced today exactly what they would have produced if they had been planted 2,000 years ago. Likewise, the gospel, which began to be preached 2,000 years ago, will produce today exactly what it did then.
Is it possible to be just a Christian like we can read of in the Bible? Is it possible to worship and serve God today without modern-day denominationalism?
Yes it is. If we will simply follow the Bible only we will be Christians only. Not only is it possible, friends, it is the only way to serve God properly today.