Not every difficult and dangerous thing is suitable for training, but only that which is conducive to success in achieving the object of our effort.
EpictetusNo living being is held by anything so strongly as by its own needs. Whatever therefore appears a hindrance to these, be it brother, or father, or child, or mistress, or friend, is hated, abhorred, execrated.
EpictetusAsk yourself, "How are my thoughts, words and deeds affecting my friends, my spouse, my neighbour, my child, my employer, my subordinates, my fellow citizens?"
Epictetus