A divine voice is always there in the heart, always calling you. But you are not available; you are engaged in mundane affairs, in ordinary things. Your mind is full of unnecessary rubbish, busy without business. So you go on missing the small voice within.
Once the mind is silent, once thoughts disappear, once you are left without any thoughts, suddenly the voice is heard. And to hear existence directly from your own heart is the beginning of transformation. It is a revelation. Existence always comes as a revelation; never as knowledge but always as revelation, remember.