The presence whose fading he regrets can only be felt if the inner being continues to be consecrated, and the outer nature is put into harmony or at least kept under the touch of the inner spirit.
At the Feet of The Mother
Sri Aurobindo to Dilip, Vol-1, 1929-1933
The idea is that, being Omnipotent, omniscient, infinite, supreme, the Divine does not scorn to descend even into the lowest forms, the obscurest figures of Nature and animate them with the divine Presence, — that shows his Divinity.
Remember that an inner quietude, caused by the purification of the restless mind and vital, is the first condition of a secure sadhana.
Cast away from you these movements of doubt, depression and the rest which are no part of your true and higher nature. ... Be faithful and you will conquer.
The Divine gives itself to those who give themselves without reserve and in all their parts to the Divine.