To be "humble in heart," as Christ stated He was, is to be submissive to the core. It involves being more interested in serving the needs of others than in having one's own needs met.
Someone who is truly unselfish is generous with his or her time and possessions, energy, and money. As that works its way out, it is demonstrated in various ways, such as thoughtfulness and gentleness, an unpretentious spirit, and servant-hearted leadership.
Ours is a day of self-promotion, defending our own rights, taking care of ourselves first, winning by intimidation, pushing for first place, and a dozen other self-serving agendas. That one attitude does more to squelch our joy than any other. So busy defending and protecting and manipulating, we set ourselves up for a grim, intense existence.
In our selfish, grab-all-you-can-get society, the concept of cultivating an unselfish, servant-hearted attitude is almost a joke to the majority. But, happily, there are a few who genuinely desire to develop such an attitude. I can assure you, if you carry out that desire, you will know the secret to a happy life.
Taken from "Analyzing Unselfishness" by Insight for Living Ministries (used by permission).