Zoroastrianism and Vedic thought share many common roots and ideas, leading to a significant influence of Zoroastrianism on the religious practices and rituals of Vedic followers. This influence can be seen in various aspects of Vedic religion, including beliefs, customs, and ceremonies.

One of the key areas of influence is the concept of duality. Zoroastrianism and Vedic thought both believe in the existence of two opposing forces, good and evil, and the constant struggle between them. In Zoroastrianism, this concept is embodied in the belief in Ahura Mazda, the god of light and truth, and Angra Mainyu, the god of darkness and deceit. Similarly, in Vedic thought, the concept of duality is represented by the two deities, Indra, the god of good and righteousness, and Vritra, the demon of evil and chaos. This shared belief in duality has influenced the Vedic followers' understanding of the world and their religious practices.

Another significant influence is the emphasis on morality and ethical behavior. Zoroastrianism places a strong emphasis on the importance of leading a virtuous life and doing good deeds. This belief is reflected in the Vedic concept of dharma, which encompasses moral and ethical duties. The influence of Zoroastrianism can be seen in the Vedic followers' adherence to dharma and their belief in the consequences of their actions in this life and the afterlife.

Zoroastrianism also influenced Vedic rituals and ceremonies. The Zoroastrian practice of fire worship is believed to have influenced the Vedic fire sacrifices, which were an essential part of Vedic rituals. In both religions, fire is seen as a symbol of purity, and its use in ceremonies is believed to purify the participants and their offerings. Additionally, the Zoroastrian practice of reciting prayers and hymns is also reflected in Vedic rituals, where mantras are chanted to invoke the deities and seek their blessings.

The influence of Zoroastrianism on Vedic thought can also be seen in the concept of reincarnation. Both religions believe in the cycle of birth, death, and rebirth, with the ultimate goal of attaining liberation or moksha. The Zoroastrian belief in the soul's journey to the afterlife and its final judgment is similar to the Vedic concept of karma and its impact on the soul's journey through multiple lives.

In conclusion, Zoroastrianism has had a significant influence on the religious practices and rituals of Vedic followers. The shared roots and ideas between these two religions have led to a blending of beliefs and practices, enriching the Vedic tradition and shaping its followers' understanding of the world and their place in it.