Indeed many of our say they love God, they are serving God. The true of the matter is that they just say it but they do not honour it with principles. The Bible of the Deuteronomy declare this principles for and there is no doubt that if these principles are disobeyed, the person will say that he is serving God.
Let us look at these principles in the Book of Deuteronomy 6:5
"Love the Lord your God with all your heart and with all your soul and with all your strength."
It is obvious that any one who wants to love God cannot do away with these three areas the the Book of Deuteronomy showed as; that is: "the love from our heart, the love from our soul and the love from our strength." In serving God, these three most vital areas should be considered, we should rather ask ourselves if have really accepted God. For many of say they love God, meanwhile their hearts are far away from God, they just it when they meet their friends in chapel, mankind is sometimes unnoticed of this situation, since they will do everything to lure people. For loving God with our strength is easily seen since through our work for God we can determined. Getting involve with God's work; preaching, singing, teaching of his words, prophesy evangelism all reveal our ways of loving or serving God through our strength.
Jesus Christ confirmed these principles by summarizing into one word, that is "Obedience." In John 14:15(KJV), "If ye love me, keep my commandments." Anybody who is obedient to God exhibit these three principles of loving God from his heart, soul and strength. No amount troubles in life will drive him to forsake his Maker. He is always faithful and ready for God all the time, whether rain or sun shine. Keeping all the Ten Commandments in our hearts and obeying them accordingly as given by God. By showing any remorse of sins that we commit and pleading of forgiveness of sins, explains greatly how we obey these principles.