From Mere Christianity:
On the whole, God’s love for us is a much safer subject to think about than our love for Him. Nobody can always have devout feelings: and even if we could, feelings are not what God principally cares about. Christian Love, either towards God or towards man, is an affair of the will. If we are trying to do His will we are obeying the commandment, ‘Thou shalt love the Lord thy God.’ He will give us feelings of love if He pleases. We cannot create them for ourselves, and we must not demand them as a right. But the great thing to remember is that, though our feelings come and go, His love for us does not. It is not wearied by our sins, or our indifference; and, therefore, it is quite relentless in its determination that we shall be cured of those sins, at whatever cost to us, at whatever cost to Him.
Over all, I can’t find much fault with Uncle Jack’s take on loving God. He did, however, miss one key concept; to possess some grasp of the depth of Jesus’ sacrifice for us, and the depth of the Father’s love for us in allowing Him to take the world’s sin-guilt upon himself, is to love God more than naturally possible. If God’s demonstration of sacrificial love for you, personally, fails to excite you with overwhelming love for Him, you’re missing one of the two elements I mentioned above.
I know that’s true because I was that cold-fish Christian. Raised in the Catholic church, I was constantly bombarded with the Stations of the Cross, and the gory details of Jesus’ passion and death. But one night God gave me a dream where I met someone who was trapped in one of the many legalistic, “Christian” sects, and I felt a love for that young man that dwarfed even the love I have for my own daughters. It was a love that made me desperate to reach him with God’s eternal truth of priceless grace toward rebellious humanity. I normally can’t remember my dreams long enough to tell about them, but this time I recalled it in vivid detail, including the desperate love I felt, so I knew it was from God. Once I understood God’s message to me, I began weeping from brokenness, gratitude, and yes, love, for the Savior I never truly knew before that time.
If God’s love doesn’t fill you with that completely overwhelming gratitude and love for Him, get to know Him better through lots of time in His Word. If, on the other hand, all this Godly love-stuff isn’t worth your effort, you need to truly turn your life over to Him, rather than continuing to practice pretend-Christianity.