John 21:21 "Peter seeing him saith to Jesus, Lord, and what shall this man do?"
Jesus had just told Peter to follow Him. However, Peter wanted to know what the Lord had planned for John. Instead of Jesus answering Peter's question, the Lord told him that what He had in store for John was none of his business.
Satan diverts many people by getting them preoccupied with what others are doing for the Lord. Comparing ourselves with others, whether we come out better or worse, is unwise (2 Cor. 10:12). We need to be so single-minded following the Lord, that we don't look to the right or to the left to see what others are doing. It doesn't matter if we are doing as much to serve the Lord as someone else. The question is, are we doing all that the Lord wants us to do?
Singleness of purpose and vision is a necessity to victorious Christian living. James said that if we try to master many things, we will fail (Jas. 3:1). We have to set priorities and focus on them.
The scriptures teach that memory can be a powerful force for good in our lives. It is always good to remind ourselves that we were once apart from God's saving grace. It is an antidote against pride and self-righteousness. A person who remembers what he used to be will have a clearer understanding of who he is now. We have to cultivate our memories by meditating on the great things God has done for us and spoken to us.