The world is driven by self-preservation and self-promotion. Individually, the natural man is guided by self-serving motives. This should not be true of saints.
It is always right to do right, but it is more perfectly right to do right for the right reasons. In other words, serve the Lord, but do so out of a pure motive.
One must choose his reward for actions taken. Would he rather receive eternal reward from God the Father, or temporary praise and recognition from his peers?
How would making your motive match the Lord's motive change how you approach the Christian life (from witnessing to praying to Bible reading and so on)?
The Bible points out that the hypocrite has forgotten God (Job 8:13). Therefore, the hypocrite shows little to no concern for receiving the praise of God. His natural desire to please God has instead been replaced with a desire to receive praise and glory from other men. This desire affects everything the hypocrite does. He gives, in hopes that others will admire his generosity (Matthew 6:2-4). He prays, hoping someone will notice the eloquence with which he calls upon God (Matthew 6:5-8). He fasts, but not in hopes of moving the Lord; rather, he wants others to marvel at the dedication with which he has devoted himself to God (Matthew 6:16-18).
Hypocrites desperately desire the praise of men, yet they are unwilling to put forth the right efforts to obtain any legitimate praise. Instead, they choose to elevate themselves by demeaning others. The actions of the Pharisee found in Luke 18:11-13 best illustrate this truth. While the Pharisee was hypocritically thanking the Lord that he was not wicked like the publican, the publican was busy confessing to God how wicked he was. In order to exalt himself, the Pharisee determined to belittle his neighbour thinking that this comparison made him look better. This practice of exalting oneself while demeaning others is as old as man himself. People today choose to inflate their own pride or position by undermining others.