Anyone who is enlightened, can see and feel God. He lives in God. He sees God as a kind of light that penetrates the entire world. He feels God as an energy around him and within him. He feels God as inner happiness, inner peace and inner strength. He realizes that he is in a higher truth, which can also be described as universal love.
Wikipedia (de): Enlightenment refers to a religious and spiritual experience in which the everyday consciousness is exceeded and a special insight into a lasting, like some sort of holistic reality is obtained.
Wikipedia: Mysticism is the knowledge of, and especially the personal experience of, states of consciousness, or levels of being, or aspects of reality, beyond normal human perception, including experience of and even communion with a supreme being. (...) The present meaning of the term mysticism arose via Platonism and Neoplatonism (...) and is the pursuit of communion with, identity with, or conscious awareness of an ultimate reality, divinity, spiritual truth, or God through direct experience, intuition, instinct or insight. Mysticism usually centers on practices intended to nurture those experiences. Mysticism may be dualistic, maintaining a distinction between the self and the divine, or may be nondualistic. Many if not all of the world's great religions have arisen around the teachings of mystics (including Buddha, Jesus, Lao Tze, and Krishna); and most religious traditions describe fundamental mystical experience.
Spiritual enlightenment means to obtain a deep insight into the purpose of all things, to understand the mind of God, or to achieve a fundamentally changed level of existence whereby one's self is experienced as a nonchanging field of pure consciousness. Mysticism is the awareness of God through direct experience.
Realize that every true religion is based on the experience of enlightenment of its founder: the Judaism of Moses, Christianity of Jesus, Buddhism of Buddha, Hinduism of many enlightened. The center of a religion is enlightenment. Moses was enlightened, as he saw a shining (burning) bush after many years of a secluded life in the desert. He saw the light of God in the bush. Jesus became enlightened, after John the Baptist gave him the Enlightenment energy (kundalini energy). After this Jesus meditated 40 days in the desert. Then the devil (his ego) left him and the angels ministered to him (he was able to help with the enlightenment energy his fellow human beings). Buddha got enlightenment after six years as a yogi under the Bodhi tree. Mara (the devil) disappeared and Buddha rested in happiness.
Moses has in contrast to Jesus, an abstract concept of God. In his central definition Moses describes God as: "I am." These words refer to God as a happy state of being which one experiences in the enlightenment. In the words "I am" the royal road to enlightenment is mentioned. Man must develop a cosmic consciousness. He loses the sense of his self (ego). He experiences himself as pure consciousness, as one with everything and can say only, "I am." He can not say: "I am the ... (name)." He identifies himself with everything. In yoga it is called Sat-Chit-Ananda, the compound from being, unity and bliss.
God is a mystery that can be described personal and impersonal. In Judaism, Christianity and Islam God is seen as an acting person. God is a supreme being, which can be addressed as a person and asked for help. Hinduism, Buddhism and Taoism (Chinese philosophy) prefere the abstract concept of God.