The Buddha has an excellent behavior beyond normal human nature, and is only seen in another Buddha. Vēranja Brahmin one day asked the Buddha “why aren’t you worship or admire the old and matured people?” The Buddha answered him “dear Brahmin, let’s say a chicken has eight, ten, or twelve eggs. When that chicken warms its eggs sitting on them without caring about the bad chicken smell it is making, the chicks will one day come out from those eggs. Dear Brahmin, the chick who will come out first by breaking the egg shell will be the eldest of all. Dear Brahmin, every being in every world is trapped within an egg known as ignorance. These poor people don’t know how to free themselves from it. In fact, I am the first to break that shell of ignorance and free myself from the suffering in which everyone is being trapped. This is why I became the greatest person among all beings of all worlds. I realized the truth of life without any guidance of a teacher. Thus, I became the Supreme Buddha (Sammā Sambuddha). This is why I am the eldest person of the entire world.”
According to this discussion, the Buddha is the eldest and the greatest of all because He was the first to realize the Four Noble Truths or the truth of the world and to attain the Nibbāna by overcoming the ignorance. Thus, who else is there to worship or to admire more highly than to our teacher, the Gautama Buddha?