The more we depend on the Lord, the more we will begin to experience internal satisfaction. The more we experience internal satisfaction, the less we need to externally satisfy the demands of the body. We will then have more time to remember the Lord, giving us increasing internal satisfaction. If you are getting spiritual satisfaction, if you are experiencing your devotion increasing, if you are experiencing Krishna’s presence in your life, and if you are seeing that your attachment to material things is diminishing, then you know you are engaged in devotional service.
(LFD Vol 3, Real Dependence, Pg 89, 1st paragraph)