Each person is born with specific qualities, or gunas as they are referred to in Sanskrit. The presence of guna and karma is what defines the material world. In the Vedic texts, sometimes God is described as nirguna, meaning without attributes, and sometimes as saguna, meaning with attributes. Every living entity possesses gunas, but God never does. When He descends to earth and takes a human form, He may be described as saguna, but that doesn’t mean that His body is material. It is a grave error to think this way. God is never conditioned in the way that we are. In the spiritual world He is sometimes described as nirguna because He has no set material form, but He is still a person nonetheless.
When the living entities come to the material world, they accept gunas based on their karma. Based on fruitive desires and work performed in the past, a spirit soul is put into an appropriate body. The three gunas are sattva (goodness), rajo (passion), and tamo (ignorance). Just as when we mix various chemical elements together in different proportions we can produce varying compounds, so the infinite combinations of gunas combine to create the various 8,400,000 species.
A person inherits specific characteristics based on the type of body given to them by nature. For example, the aquatic species have gills, meaning they can only survive in the water, whereas human beings are meant to live on land. Penguins have a body suitable for living in colder climates; birds can live on tree branches since they can fly high in the sky, and so on. This is all part of nature. There is nothing anyone can do to change these realities, though human beings have spent a lot of time trying. We invested much time, energy, and money in space exploration, but the Vedas tell us that this is all a waste of time. If we want to go to the moon or the sun, or anywhere else in space, God will happily give us a suitable body for such purposes. We needn’t try to travel to these places in our present bodily form because such efforts will always prove to be futile. Man has gone to the moon, but only after building large spacecrafts. There is nothing natural about a man living on the moon or any other planet except earth. In a similar manner, man doesn’t need to try to fly, for birds already have that capability. God specifically gave us this human form of life so that we could use it for the highest purpose, that of knowing and loving Him.
Not willing to do that, Rama left for the forest along with Sita and Lakshmana. Early on in their journey, Rama started to lament the plight of His father and mother, so He asked Lakshmana to return to the kingdom and take care of them. In the above referenced statement, Lakshmana is responding to Rama’s request by boldly declaring that both he and Sita could not live without Him, for they would be like fish out of water living in a kingdom devoid of Rama.
These are qualities exhibited by only the most advanced devotees. A bhakta, or devotee, dedicates their life completely to God. While most of us look for happiness in the areas of sense gratification, economic development, or ritualistic religious performances, devotees abandon all these things in favor of direct service to God. He is their only hope and savior, for they know that God is the reservoir of all pleasure. Life with Him is pure bliss and anything else is pure misery. Bhaktas reach an advanced stage of consciousness where they can only think of God at all times.
“Both of you, husband and wife, constantly think of Me as your son, but always know that I am the Supreme Personality of Godhead. By thus thinking of Me constantly with love and affection, you will achieve the highest perfection: returning home, back to Godhead.” (Lord Krishna speaking to Vasudeva and Devaki, Shrimad Bhagavatam, 10.3.45)
Our real position is that of servants of God. God is great and, bereft of His company, we are anything but great. He is the master and we are the servant. He is the fire and we are the sparks emanating from that fire. These are some of the ways the Lord is described in the great Vedic texts. Our real home is in the spiritual world with God. The spiritual planets of Krishnaloka and Vaikuntha are where we are meant to stay. That is where the Lord resides in His original form and also in His various expansions. There are other heavenly planets, but they are all part of this material world, meaning residence there is not permanent. Those who go back home, back to Godhead, never have to take birth again.
“That abode of Mine is not illumined by the sun or moon, nor by electricity. And anyone who reaches it never comes back to this material world." (Lord Krishna, Bhagavad-gita, 15.6)