For it must needs be, that there is an opposition in all things. If not so, righteousness could not be brought to pass, neither wickedness, neither holiness nor misery, neither good nor bad. (2 Nephi 2:11)
In order for muscles to grow and gain strength, they must be broken down through strain. Likewise, we must pass through affliction and face opposition in order to grow and develop. This episode discusses the principle of opposition and why it is necessary for us to experience it in this life.