It is suggested that Christians too often fail in these ways:
1) Too much money. "Wealthy Christian" should be an oxymoron. In Luke 12:33, Jesus says, "Sell your possessions and give to the poor." In Matthew 19:21, he says, "If you want to be perfect, go, sell your possessions and give to the poor." In Matthew 6:24, he says, "You cannot serve God and Money." Christians are generally pretty huge on cleaving to the word of God. I just don't see how those particular words could be clearer.
2) Too uneducated about Christianity. Generally speaking (which of course is the most offensive way to speak about any group of people), Christians tend to embarrass themselves by knowing so little about either the Bible or the history of Christianity. Believing that the Bible is the word of God, for instance, is one thing; knowing nothing about the long process by which men decided which texts would and wouldn't make it into the Bible is another. It's not that all Christians should be full-on theologians or historians. But if you're a Christian who doesn't know the Great Schism from The Great Santini, or the Diet of Worms from ... well, the diet of worms, then you've got some homework to do.
3) Too quick to believe that we know what God really means by what he says in the Bible. The Bible is an extremely complex, multi-leveled work. We're sometimes too quick to assume that we grasp its every meaning. Take this passage, for instance, from Luke 8: 9-10: "His disciples asked him [Jesus] what this parable [of the sower] meant. He said, 'The knowledge of the secrets of the kingdom of God has been given to you, but to others I speak in parables, so that, "though seeing, they may not see; though hearing, they may not understand."'" Huh? And that's Jesus "explaining" what is generally regarded as one of his most readily understood parables! Are we really all that confident that we always know exactly what Jesus meant by everything he said? Wouldn't we do well to sometimes admit that the words attributed to God manifested on earth are just a tad, well, Greek to us?
4) Too invasive of others generally. It is my personal, humble opinion that anyone seeking to mix church and state has failed to understand the nature and role of either. Being founded upon the principle that all men are created equal and deserving of equal protection under the law is what makes the American system of democracy such a gift to mankind. Attempting to mix the inherently exclusionary imperatives of a particular religion into the resolutely inclusive system of the American constitutional form of government is to work against everything that America stands for. Religion is a personal, subjective affair for the individual; politics and public policy is an impersonal, objective affair for everyone.
5) Too invasive of others personally. Christians are too often too eager to get up into the faces of others about their personal religious beliefs. If you believe in the reality of hell, then wanting to save non-Christians from going there is a worthy sentiment, of course. But the bottom line is it's absolutely impossible to talk someone who isn't a Christian into becoming one; in fact, more than anything else it's likely to push the non-Christian further from God. I believe Christians would do very well indeed to spend their time "just" living as Christians, and let God worry about the non-Christians.
6) Too quick to abandon logic. When talking to others about Christianity, Christians too often resort to a language and line of reasoning that leaves good ol' fashion logic sitting on the ground behind us, waving a sad good-bye. "It's true because the Bible says it's true" is, for instance, an assertion that can't help but leave the non-Christian unimpressed, since it's so manifestly illogical. "It's true because the Bible says it's true" is no more proof of truth than is, "Apples are the best of the fruits, because I think that's true." Christians need to more readily admit that the religious experience -- no matter how riveting and real it is to the person experiencing it -- remains a subjective phenomenon, and talk about it that way.
7) Too confident God thinks we're all that. I'd like to humbly suggest that Christians spend a little more time wondering how they might displease God and a little less time being confident that they do.