Swami Vivekananda, an old sage of the late 1800s in India asked this question: Have you seen God? But God does not appear in front of you saying "I am God, worship me". So how can you know if you have seen him? Through meditation you can learn that God is in everyone and everything and the state of liberation is to feel Him around you, and within you. Moksha is the realisation of one's divine nature. But there is no room for laziness, to reach the Jivamukti state, you have to practice: meditate and meditate some more.
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Lecture on 4 dimensions - Mani Raman
Is Ashtanga Yoga for everyone?