Jesus commanded that we serve one another, but obeying this mandate in humility is not natural for us. Sure, there are times we like to help others. But service that involves self-sacrifice--especially for someone we deem undeserving--much more difficult to do.
What does it mean to serve? Consider Christ's example. He gave up everything in heaven to live among us, subjecting Himself to dishonor and human frailty. And He loved even those who rejected Him. Think about how He humbled Himself and washed the disciples' feet at Passover. This was a disgusting, lowly task that a slave might be assigned--far from anything a king should do. He even knew these men were about to abandon Him but served them anyway.
Ultimately, Christ gave His life for us. And He did so while we were still sinners (Rom. 5:8). Serving others was His lifestyle--part of who He was and what He did. As His followers, we should strive to be like Him.
Therefore, service involves first dying to our selfish attitudes and motives. Only then can we live to glorify Christ. Jesus said that the greatest commandments are to love God wholeheartedly and to love others (Matt. -39). Ironically, it is only when we humbly serve others that we experience God's fullness in our own lives.
Many try to achieve happiness by striving after their own desires. The result? Tired, unsatisfied people. True contentment happens only when we walk closely with Jesus. He shows where we can humble ourselves and take care of others. These actions, done through His strength, will be blessed.