It discussed two related ideas held by the three men above, expressed by Lewis in his Reflections on the Psalms, Edwards in his Freedom of the Will, and Piper in Desiring God: Meditations of a Christian Hedonist.
And drat, I’ve only read one of three.
1. Everyone chooses that which they believe to be good for them. It isn’t like good men desire nothing and bad men desire stuff – everybody desires something. Good men desire good things, bad men desire bad things.
2. Everyone chooses whatever is their strongest desire. There are “free agents”, but there isn’t “free will”, at least not as some people use the term. If we could place you in a situation in which you found a few choices before you, and if we could somehow perfectly know your heart, then we could predict with certainty what you would do – you would not act contrary to your strongest desire. You do not have that freedom.
Watch the whole video for elaboration and examples.