"For he who is least among you all--he is the greatest." (Luke 9:48)
45"Again, the kingdom of heaven is like a merchant looking for fine pearls. 46When he found one of great value, he went away and sold everything he had and bought it." (Matthew 13)
In a simple parable Jesus has summed up what we as Christians have done. We have found the truth, and accepted it. The kingdom of God has such great value that we as Christians are willing to give up everything we have.
In fact the book of Matthew says this as well. "21Jesus answered, 'If you want to be perfect, go, sell your possessions and give to the poor, and you will have treasure in heaven. Then come, follow me.'" We are clearly to give up everything, and then follow him.
"If anyone would come after me, he must deny himself and take up his cross daily and follow me." (Luke 9:23) What are some things that we should leave behind? Our old secular ways, our sinful desires. We can not be consumed about ourselves, we must "deny" ourselves. As followers of Jesus Christ we must be leading a holy life as a pointed out earlier. All of our energy, all of our strength is focused on serving Jesus Christ.
God bless.