Anything seen as other than Brahman-Self is bound to cause fear and trouble

There is not an atom apart from the Self, which is the integral undifferentiated perfection of whole Being. Soul, world and Creator are inseparable from the Self. The reality of these is the reality of the Self only. (Ch. 10, v.34)

All ignorance and illusion, all objects inert and living, all beings and non-beings, all the five elements, all the diverse worlds, all bodies and the lives that arise in them, not being apart from Brahman-Self, are Brahman-Self only. Existence alone is, for even non-existence acquires meaning only in Existence. Simply put, everything exists always as Brahman-Self only. (Ch. 12, v.2)

All objective knowledge, all thought forms, all visible objects, all things heard, all questions and answers, all the food consumed and all other illusions, not being apart from the Self, should be regarded as Brahman-Self only. (Ch.13, v.2)

~ Essence of Ribhu Gita (translated by Prof. N. R. Krishnamoorthi Aiyer)