When one becomes deeply immersed in prayer, the “I-thou” duality merges into oneness, like in love where beloved and lover no longer exist; only love and love alone remains. That is how prayer turns into meditation. In real meditation (dhyana in Sanskrit), there is only oneness — the pure I-awareness as a witness. The witness alone exists with nothing to be witnessed. This oneness, not duality, is the experience of conscious silence.
Note: Commonly translated as meditation, the word “dhyāna” cannot be translated into English. The English word “meditation” is derived from the Latin verb meditari, meaning “to think, contemplate, devise, ponder, to exercise the mind.” The word, “dhyana” does not mean contemplation at all. Anything within the realm of the mind is not dhyana.