Sloth is the great enemy -- the inspirer of cowardice, irresolution, self-pitying grief, and trivial, hairsplitting doubts. Sloth may also be a psychological cause of sickness. It is tempting to relax from our duties, take refuge in ill-health and hide under a nice warm blanket.
PatanjaliWhen you are steadfast in your abstention of thoughts of harm directed toward yourself and others, all living creatures will cease to feel fear in your presence.
Patanjali