From the inside and the outside you shall overlay it." This is an allusion to the Torah student whose interior should match his exterior, i.e. he should not pretend to be pious when in truth he is not.
Rabbi Rava states " Any student of the wise whose inside is not like their outside is not really a student of the wise."
Rabbi Arthur Green
The Language of Truth The Torah Commentary of the Sefat Emet, Rabbi Yehudah Leib Alter of Ger
Every soul is a chamber for God, a vessel that contains the divine light. This is the message the Hasidic masters repeatedly associate with the tabernacle and all the details of its making; in all these ways are we to fashion our inner chambers, to make them a proper dwelling place for God. In our souls we light a lamp for God, set a table, raise up an altar. Truly, God needs no intermediary. The divine light seeks out only the soul and would be please to dwell directly within us. It is only our sin, that which makes us feel separate from God, that causes us to need ritual forms, chambers in which we can allow God's presence to dwell. These outward signs, whether in the grand form of the tabernacle or the little boxes of tefillin, help to attract the light, to bring it to its true home within the soul.