" True holiness does not make a Christian evade difficulties, but it allows him to face and overcome them. Jesus wants His people to show that His grace is not a mere greenhouse plant that can only thrive under shelter, but is a strong, hardy thing that can flourish in every circumstance of life. It is doing our duty in that condition to which God has called us – like salt in the midst of corruption and light in the midst of darkness – that is a primary element in sanctification. "

― J.C. Ryle , Holiness