John Ortberg, in Seven Things I Hate About Spiritual Formation:
Just as there is an ‘outer you’ that is being formed and shaped all the time, like it or not, by accident or on purpose, so there is an ‘inner you.’ You have a spirit. And it’s constantly being shaped and tugged at: by what you hear and watch and say and read and think and experience. Everyone is being spiritually formed all the time. Whether they want to or not. Whether they’re Christian or not. The question isn’t if someone will sign up for spiritual formation; it’s just who and what our spirits will be formed by.
Photo credit: Samuel Cashwan (right) and an assistant, working on the sculpture Peace; via Archives of American Art.