"Love your neighbor as yourself". 

  "You are not immediately kindled into anger and wrath against yourself, nor do you express it with such violence, though you have often done yourself more injury by your own sins than all other persons ever could do you. You do not bear malice against yourself, nor hate yourself, though you have, perhaps, some evil qualities belonging to you, and are long in patience with yourself and you forgive yourself easily: learn then to be patient and forgiving to your neighbors." Isaac Watts.