Noun
semblance - The way something appears on the surface, often without revealing the true nature or reality behind it.

In spite of their their kids' constant uncontrolled behavior, when they were outside they managed to keep up the semblance of calm, even though things were not so calm inside their house.
nirvana - (in Buddhism) a transcendent state in which there is neither suffering, desire, nor sense of self, and the subject is released from the effects of karma and the cycle of death and rebirth; it represents the final goal of Buddhism

As the Buddha meditated under the banyan tree, a serene glow seemed to appear around him when he finally achieved nirvana.