Vedas collectively focuses on two aspects – the external world of a human being and the internal world. Externally, it explains deity worship, who are part of existence, but above the human beings. By worshipping them, they bestow blessings to fulfill the desires.
Human life is full of desires – both selfish and selfless. It is sometimes for the survival of their own or otherwise. Fear of God is one factor that drives the human beings in this world, especially in the Hindu tradition.
In Vedic tradition, it is believed that by doing the duties based on “dharmic” principles, one reaches heaven. These ancient scriptures explain the duties one has to perform in each and every stage in life. These duties are to be performed as a student, as a son or daughter, as a husband or wife, as father or mother, etc.
But for a spiritual seeker, who inquires about own being or wants to go beyond all these external rituals to find its source, needs to follow the path as prescribed in Upanishads.
Truth or the concept of Supreme Consciousness is well explained in Upanishads either with the help of dialogues between sages and their disciples, or as a story that happened in the life of sages, etc. These stories stimulate thought process and provoke questions in one’s intellect and this makes the mind sharper and contemplative.
Only a contemplative mind can grasp the knowledge about ultimate truth. This also helps one in meditation. As one starts to contemplate on the evolution of human birth, purpose of life, etc., the mind goes to a meditative state. This state gives the experience of peace which cannot be attained through any other means. One meditates on the Supreme Being or the Absolute so that the individual merges with the cosmos.
The union of Jivatma with Paramatma is logically explained well in Upanishads. By practicing the methods explained, one gets convinced and experiences true peace within.