In Bhagavad Gita (7.19). the Almighty Lord Krishna has made very remarkable statement: “After many births, a man of knowledge (jnani) takes refuge in Me (God, Krishna) realizing that everything is God (Krishna). Such a great soul who realizes that everything is manifestation of Krishna is very rare. ”
Knowledge is means to understand the true reality. The true reality is that God is all and everything is God. This recognition and acceptance is true knowledge. This is conclusion of all Vedic literature including Vedas, Upanishads and Puranas.
Srimad Bhagavatam 11.13.24 – “Within this world, whatever is perceived by the mind, speech, eyes or other senses is Me (God) alone and nothing besides Me (God). All of you please understand this by a straightforward analysis of the facts.”
The world has different living entities including humans, animals, birds, insects, tree etc. It is comprised of inert objects like mountains, rivers, ocean, soil, air etc. All these are manifestation of God and He pervades all living being and objects. Within all beings and objects, there is immutable and eternal essence of God. Mistaken we notice the outer covering but don’t dive deeper to discover what is within. That is why Krishna says in Gita 18.44 – “After knowing my quintessence (tattva), man immediately enter into Me”. What is this knowing of the essence? This world is full of diverse living beings and objects, yet what resides intrinsically within has no material form and that formless essence is God. Various gold ornaments can be different but yet they are made of element gold. They may undergo change and alteration but yet their contend will remain same. The same way the world undergoes continuous change but its Godly essence always remain same and is changeless. From the perspective of devotee, there is only one God who appears to us in different forms. When we are hungry, He appears to us in the form of food; when we are thirsty, He appears as water; when we are sick, He appears as medicines and doctor; He appears as different pleasures to give us happiness. So, the devotee remains ever satisfied and happy in this world as this world is manifestation of God. He treats people and other living entities with love, respect and care and serves them with all his capacity.