Contents of the Vedas

“God is the ultimate theme of the Vedas. All should follow the Vedic instructions and do their activities with the glorification of God, so that they may attain success and accomplishment in material and spiritual matters concerning this life and life after death, by doing good to others according to their ability.” Maharishi Dayanand Sarsvati (1824—1883)
God Sustains the Universe
महद्यक्षं भुवनस्य मध्ये तपसि क्रान्तं सलिलय्स पृष्ठे |
तस्मिन् श्रयन्ते य उ के च् देवा वृक्षस्य स्कन्धः परित्इव शाखाः || AV 10.7.38
Mahdyksham bhuvnsya mdhye tpsi kraantam salillysa prishthe, tasmin shrynte y u ke ch devaa vrikshsy skandhah pritiva shaakhah. AV 10.7.38

Meaning: God is the highest object of adorations, who pervades the universe and possesses the super-most knowledge. He is the supporter of the universe, as trunk of a tree upholds all the branches.
Knowledge
Vedas contain spiritual wisdom and knowledge for practical life as well – science, technology, medicines, health, society, family, economics, mathematics, finance, research, education and so on. The foremost of them is of God (Brahma-Vidya) and soul.
Two kinds of Knowledge
Apara: Knowledge of all material things from blade of grass to rockets and their proper use.
– Vedas say use air, water, and fire to build aircrafts, ships and other vehicles for land, space and water.
– They say visit other lands by building rockets and spaceships.
– They contain the knowledge of movement of the stars, sun, moon, earth and more.
– Mathematics, technology, science etc. are all found in the Vedas
Para: By which one knows Brahma (God) and self (Atma/soul), who are invisible is called para.
– Vedas dictate God: Blissful, Formless, Unborn, Omnipresent, Omniscient, Omnipotent, Just, Kind, Sustainer, Nurturer, Holy, Infinite, flawless, Eternal and the Creator of the universe.
– Atma/soul is never born and never dies. Atma is ruled by the law of Karma (as you sow, so shall you reap).
– Vedas dictate that the real aim of human life is to attain Moksha/liberation (all bliss – freedom from the cycle of rebirth).
Karma/Actions are also Two Kinds
Ordinary: Acquiring riches enjoyment and success. Most humans are absorbed in their daily routines of work, families, pursuing material objects and having no time to think or do anything else. When it comes to spirituality, they are lost in blind faiths, rituals, superstitions and similar ignorant activities. The ultimate result is pain and sufferings, Atma/soul stays in the cycle of birth and death.
Moksha: No life human or non-human is without sufferings. The only way out is Moksha or liberation. Moksha is:
– Freedom from the cycle of birth and death.
– Being blissful, happy, joyful, and staying in the company of God.