Entering the Kingdom of Heaven

There are many passages in the Bible which make it clear that it is impossible -- or as close as it gets -- to enter the Kingdom of Heaven. In fact there are more such passages than people usually imagine. One just needs to look at some of the sins which are listed in the New Testament (say, Galatians 5). I do not think that one can take these passages lightly. I take them as warnings that one absolutely must get clear what the grace of God is, and why one will receive it.