28
Śrī Īśopaniṣad
everything is but the potency of the Lord, can lead one to the revival of his original consciousness, which was lost on account of association with  māyā , the external energy.
All power is obtained from the Lord, and therefore each particular power must be utilized to execute the will of the Lord, and not otherwise. The Lord can be known by one who has adopted a submissive attitude. Perfect knowledge means to know the Lord in all His features, to know about His potencies and how such potencies are working by His will. These things are exclusively described by the Lord in the  Bhagavad-gītā , which is the essence of all the  Upaniṣads .
MANTRA FIVE
तदेजति तन्नैजति तद् दूरे तद्वन्तिके । तदन्तरस्य सर्वस्य तदु सर्वस्यास्य वाहतः ॥ ५ ॥
tad ejati tan naijati tad dūre tad vantike tad antarasya sarvasya tad u sarvasyāsya bāhyataḥ.
tat —this Supreme Lord;  ejati —does walk;  tat —He;  na —not;  ejati —does walk;  tat —He (is);  dūre —far away;  tat —He (is);  u —also;  antike —very near;  tat —He (is);  antar —within;  asya —of this;  sarvasya —all;  tat —He (is);  u —also;  sarvasya —all;  asya —of this;  bāhyataḥ —external to.
TRANSLATION
The Supreme Lord walks and does not walk. He is far away, but He is very near as well. He is within everything, and again He is outside of everything.