The inner smile is a very simple exercise from Taoist yoga. (See the link for more details.)
When I do it, I notice a shift into holding my body in kindness and well-wishing, and this then naturally flows into the whole of my human self, any situation I am in, and others.
My personality may not like characteristics of my body or human self, or particular situations or people, but it doesn’t touch the kindness and well-wishing there for them.
The inner smile invites in an open heart, open for whatever is happening.
From a rigid view, ambivalent heart, reactive emotions, and general contraction, tension and identification with stories, there is a shift into a more fluid view, open heart, nurturing fullness, relaxation and a softening of identification with stories.