(Oh, Proust. Feel how you want to about the French, but their ability to produce crispy-soft baguettes, flaky-sticky macarons and sardonic-revolutionary 'intellos' is beautiful.)
As Proust succinctly notes in the quote above, habits become a second nature which prohibit us from living life in our first nature. First nature being the experience of life as it happens to us directly, as if everything is happening for the first time. (Which in yoga is referred to as the beginner mindset.) As if every bite of a peanut butter sandwich even if you've had 7800 in your life was the first bite or the last. As if it was the first taste of salty, oily crushed peanuts and sweet, yeasty bread meeting the tips and sides of your tongue, the roof of your mouth, the insides of your lips. It means realizing that saying goodbye to someone is sad, or that being honest with someone is a bit frightening. It's a way of living attuned to our senses and sensitivites. So yes, it might hurt more finely to live life with awareness because the sharpness of pain is more acute, but so too is the joy. Wouldn't we rather endure the brief sting of acute pain over the prolonged dull, gnawing ache that has neither location nor sensation, that grey and bleak feeling of colorless sadness? So in our first nature - which is not relying on habitual patterns of behavior or thought - we may be more aware of pain but we are also equally as aware of joy; the joy is fleshy, vibrant and delectable.