The Pharisees distorted the emphasis of biblical righteousness to suit their own behavioral patterns of self-justification. Jesus frequently confronted the Pharisees on this point. Jesus said to them, “You tithe mint and dill and cumin, and have neglected the weightier matters of the law: justice and mercy and faithfulness” (Matt. 23:23a). On numerous occasions, Jesus acknowledged that the Pharisees scrupulously obeyed some points of the law. They paid their tithes, they read their Scriptures, they did a host of things the law required-and Jesus commended them for their actions, saying, “These you ought to have done” (Matt. 23:23b). However, it was the emphasis that was out of kilter. They scrupulously tithed, but in doing so they used their obedience to this lesser matter as a cloak to cover up their refusal to obey the weightier matters of justice and mercy. That distortion occurs today.
IT IS MUCH MORE DIFFICULT TO MEASURE THE DISPOSITION OF OUR HEARTS THAN IT IS TO MEASURE THE NUMBER OF MOVIES WE ATTEND
Why do we have a perpetual tendency to major in minors? As Christians, we want to be recognized for our growth in sanctification and for our righteousness. Which is easier to achieve, maturity in showing mercy or in the paying of tithes? To pay my tithes certainly involves a financial sacrifice of sorts, but there is a real sense in which it is cheaper for me to drop my money into the plate than it is for me to invest my life in the pursuit of justice and mercy. We tend to give God the cheapest gifts. Which is easier, to develop the fruit of the Spirit, conquering pride, covetousness, greed, and impatience, or to avoid going to movie theaters or dancing? We also yearn for clearly observable measuring rods of growth. How do we measure our growth in patience or in compassion? It is much more difficult to measure the disposition of our hearts than it is to measure the number of movies we attend.
It is also our inclination as fallen creatures to rate as most important those virtues in which we have achieved a relative degree of success. Naturally, I would like to think that my moral strong points are the important ones and my moral weaknesses are limited to minor matters. It is a short step from this natural inclination to a widespread distortion of God’s emphases.
Source: RC Sproul