Some find it hard to know how to regard the differences in spiritual maturity that exists among Christians. Are these differences always good? Are they bad? In this sermon on Romans 14:1 titled “Weak in the Faith (1),” Dr. Martyn Lloyd-Jones provides some biblical answers to these questions. He starts by asking a foundational question: what does it mean to be weak in faith? The believers Paul was talking about and writing to were true Christians that were falling into legalism. He reminds that all believers are the same as it relates to justification and regeneration and the basic need for being saved from sins. However, some are stronger than others. What causes this? Dr. Lloyd-Jones posits that natural personality often lends itself to different strengths and weaknesses in different people. Additionally, the diligence and application of people as Christians also play a large part in the strength or weakness of someone’s faith. He also suggests that the length of time one has been a Christian will affect this. Thankfully the Christian is given the power to grow by the grace of God so if one’s faith is weak, they should not be anxious but continue to seek the Lord and it will grow.

http://www.mljtrust.org/sermons/weak-in-the-faith-1/