He simply talked himself into the decision. Human nature is quite interesting. We can convince ourselves of just about anything if we really want to. But it's very fascinating to see how we convince ourselves of things we really don't want to believe or desire to happen. We actually find that we manipulate our own actions and eventually the actions of others.
Discouragement is a natural part of life.
We all experience it at one time or another. We just need to make sure that we don't make critical decisions based upon that discouragement. We need to allow the peace of God to rule in our hearts. It's in those times of discouragement that we must determine to seek the face of God for His leadership. Seek God and seek the wise counsel of His people.