Equanimity is a state of psychological mind/soul stability and composure which is balanced and undisturbed by experience of or exposure to emotions, discomfort, or other phenomena that may cause others to lose the balance of their mind/soul.
In essence, from a yogic perspective, Equanimity is the ability to be with what is.
We can practice Santosha (equanimity) in Yoga posture practice by letting go of the desire to attain the perfect looking pose, by working within our current ability and feeling and accepting the experience of the pose as it is without wanting to force or to change it.
We can apply Santosha (equanimity) in our Mediation and Mindful practices by noticing our thoughts, feelings, emotions in a given moment, by observing without judging, without criticising or analysis and by acknowledging and accepting whatever arises.
Through cultivating Santosha (equanimity) in our practices we become present in our life to what is actually happening, we become aware of what experience is being given and of what we are giving.
This allows us to take space for the beautiful Gift of Giving and for Gratitude.