Self-realization or enlightenment is valuable chiefly because it indicates that the mind has seen its own boundaries. Now, like some kind of billiard ball, it's going to bounce against them until it loses its energy and finally comes to a rest. The realization of the true, eternal calm of the Self is not enough to immediately quiet the mind.
To quiet the mind, the mind must slowly wear away all its old habits and desires, which were based on the illusion of being an independent doer, thinker, and enjoyer. It is merely an image, a shadow, and when it grasps that, it falls silent.
It must grasp and fall silent without ever seeing for itself. It cannot see the Truth. It can only intuit it from the sense of reverence and awe -- and perhaps bliss, yes -- it gets at times when it falls silent. Technically those experiences are mental experiences, however, and not experiences of the Self per se. Still, those are the experiences upon which the mind must grow less dependent over time.
Trusting in them, it must slowly grow faith, rest in the knowledge of its own image nature, and grow quiet. And in that quiet the true happiness of the Self will shine, as through a perfectly clear window.