There are stories, legends, mythologies, folklore, traditions, histories, scriptures, and texts from all around the world which tell us of humans who have reached the stature of the gods. They have, in essence, become "a god." Some recognizable examples are people such as Jesus, Siddhartha Gautama (Buddha), and Muhammad. The process that these went through has been called theosis, deification, divinization, realization, awakening, and enlightenment. What does it mean to become or be "a god"?
Eternal life is not eternal if it doesn't exist right now, because that which is eternal has no beginning or end. We either have eternal life now, or we don't have it. Because you are reading this now, you can be sure you have it, even if you don't know it for yourself.
Many mystical paths in the world's spiritual traditions claim to lead one to a conscious merging, union, and a direct identification with Deity, the Sacred, Reality, the Universe, the Transcendent, with a first-hand experience of being God.
Although it may sound blasphemous to some, even most of Christianity agrees that the end goal for humanity is theosis, deification, or divinization, which means to "become God."
The only God that we can find and perceive and know directly as such, I believe, is the one that can be found in the very center and heart of our own Self and Being and Consciousness. That is where God is. That is where God lives. That is God, in humanity.