[rinkjustice]

In my experience, comfort has been the enemy of my personal progress. It's certainly one of the tenants of Rejection Therapy: http://rejectiontherapy.com/rejection-therapy-faq/

One thing I'll add: riding out your adrenal spikes and maintaining high mental and physical functionality is probably one step better to "tricking" yourself to not feel so uncomfortable, but it's harder to do.