Lift up thy feet - That is, Advance, or draw near. Come and look directly and personally on the desolations which now exist in the holy city.
Unto the perpetual desolations - Hebrew, “the ruins of perpetuity,” or eternity; that is, such as have been long continued, and threaten to continue forever. The ruin had not suddenly come, and it did not seem likely soon to pass away, but appeared to be entire and permanent. The destruction of the city seemed to be complete and final.
Even all that the enemy hath done wickedly - That is, with wicked intent and purpose. The reference seems to be to the Chaldeans, and to the ruin which they had brought upon the temple and city.
In the sanctuary - That is, either Jerusalem, considered as a holy place; or the temple, the place of the public worship of God.