That verse cannot get any more simple. We show that we love God by keeping his commandments. In other words, we show that we love God, by doing what he says.
I believe that there are a lot of people in our churches today that call themselves Christians but you would not know it by the way that they live their lives. Obedience helps to conform us to the image of Christ. There is no greater reward than to be conformed to the image of Jesus.
God wants us to approach him as a child approaches their father. God is a good father and he wants what is best for us. What is best for us? Conforming to the image of Jesus and glorifying our Heavenly Father.
Obedience to God is not burdensome. We just act like it is. We act like it is difficult and we act like little kids that do not get their way. Sometimes we know God is calling us to obedience and we throw our version of a spiritual temper tantrum. We seek to rebel because obedience is not what we want.
Obedience is not what we want because our hearts are naturally drawn to what is selfish and sinful. What is selfish and sinful will destroy us. Our hearts are naturally prone to wander and stray from what God has designed for us. We must be mindful to discipline ourselves to do what is right in the eyes of God. We must work at it.
You cannot eat one salad and expect to lose weight. You cannot go to the gym for a week and meet your ideal goals. It takes time and discipline. We must train for obedience. It comes down to whether or not we really love God. Do we desire to be obedient because God is all we desire? Is God our true treasure? Do we value being in his presence? When you truthfully answer those questions you will know where you stand.
Obedience Is Not Troublesome.