All is change in the world of the senses,
But changeless is the supreme Lord of Love.
Meditate on him, be absorbed by him,
Wake up from this dream of separateness.
Fools, dwelling in darkness, but wise in their own conceit and puffed up with vain scholarship, wander about, being afflicted by many ills, like blind men led by the blind. (Mundaka Upanishad)
To the seer, all things have verily become the Self: what delusion, what sorrow, can there be for him who beholds that oneness? (Isa Upanishad)