Very simply put - these 4 are mentioned for emphasis. They show that the whole person is involved in this love thing. You don't control your Christian discipleship strictly by your emotions. Following Jesus is not filled up only with mystical moments. Living as a disciple is not something to be lived with only the intellect.
Authentic faith is more than simply getting all busy with various ministry projects.
Heart, soul, mind, strength. The hard part is keeping them together. The word I would choose would be. . . . . . . . We live in a busted up, splintered, divided world. Countries, our own included, seem to come apart at the seams.