Just as breathing and the circulation of the blood, food, nourishment are necessary for the existence of the body, so bliss is necessary for the soul. But a little digging inside is needed so that we can uncover the undercurrent. Once you have known your blissfulness, the source of it, your whole vision changes, your whole perspective is new.
Then you look at existence with new eyes. Then whatsoever you have found inside yourself, you will find everywhere because whatsoever we are, we find in existence. Existence is simply a mirror: it reflects our real face, whatsoever it is. If we are covering our real face with a mask, the mask is reflected.
Existence only echoes our beings. Once you have known that bliss is your nature, the whole of the universe becomes blissful. That is what is meant by realization, liberation.