The Vedas are considered very important in Hinduism because they tell us how the rishis felt when they experienced God. The Vedas tell us how we can experience God for ourselves. The Vedas were first written in a very ancient language called Sanskrit. Veda in Sanskrit means knowledge. So the Vedas are books of knowledge about God.

The Upanishads are parts of the Vedas that are very special. The Upanishads tell us how everything and everyone is connected to God. They tell us that the essential nature of everything including ourselves is something very special called the Spirit or Brahman.

The Gita is another important holy book of the Hindus (contains the essence of the Upanishads). It teaches how we can relate to God in different ways, and how we can use different pathways to reach God. Some people find God through prayer and worship, some by doing good deeds, and some reach God by meditating. We can use any of these ways to find God or invent our own special way to reach God.

Reference: Primary Hinduism by Seeta Lakhani (Ch.3, 'Hindu Holy Books', p.33)