This is a classic Involutionary Inward Path view of Tradition. “Liberation” is here defined by “identifying” the individual Spirit with the universal Spirit, which is no small task in itself. However, this is not nearly enough, although Shankaracharya is right that yoga or analysis, ceremonies and learning (which are not that different in any case all being more or less defined in the Inward Path) won't get you there either. It won't get you there because it is more or less a liberation of the human Mind-Soul into the “universal spirit,” which was really an earlier and perhaps better version of the Jungian human Unconscious.
For Real liberation, or rather, for Real Attainment of Godhood, we must evolve all the way to Godhood through the “dreaded” and Spiritually Blockaded Evolutionary Outward Path of material evolution, leading to the Supreme Object Godhood. This is not merely identifying with God, this is attaining Godhood. The Evolutionary Christian Church affirms both the Inward and Outwards Paths.