During mindfulness meditation practice, we try to maintain an attitude of equanimity towards our sensory experience. This attitude can also be described as complete acceptance, allowing, or radical non-interference. As sensory experiences arise, you let go of any resistance to, or judging of, the arising, and allow the subsequent passing to happen without any clinging. Another way to think of it is as loving tolerance – the way you would regard your own baby as it spits up on you. Equanimity is bringing this attitude to whatever arises during your meditation practice.