Writers 
God expects you to reach the goals that He has designed uniquely and individually for you. Nobody else can do what He created you to do.
Nobody else can do the believing and the work necessary to accomplish the goals He has set before you.
Take God at His Word. Many people doubt because they do not take God at His word. They read the Bible but then conclude, That is for somebody else. What you read in the Scriptures is for you. Count on it. James wrote about this: If any of you lacks wisdom 'and we could insert here anything that we need or lack, let him ask of God, who gives to all liberally and without reproach, and it will be given to him. But let him ask in faith, with no doubting, for he who doubts is like a wave of the sea driven and tossed by the wind. For let not that man suppose that he will receive anything from the Lord; he is a double minded man, unstable in all his ways. (James 1:5–8)
The person who is wishy washy in his pursuit of a goal, emotionally unsteady and uncertain about what he believes to be God’s truth and God’s promises, sets himself up for failure. Nobody else can be blamed.
On the other hand, Jesus gave us great encouragement about what happens to those who face situations with faith rather than doubt. He taught:
Have faith in God. For assuredly, I say to you, whoever says to this mountain, “Be removed and be cast into the sea,” and does not doubt in his heart, but believes that those things he says will be done, he will have whatever he says. Therefore I say to you, whatever things you ask when you pray, believe that you receive them, and you will have them. (Mark 11:22–24)
You must not be unrealistic in pursuit of a God given goal. The removal of a mountain may take time in some cases, years or decades. But if you are steady in your pursuit of the goal, the mountain will go, the obstacles will be overcome, the roadblocks will be removed. You must not set yourself up for doubt by thinking that you can accomplish everything in a day.
Consider for a moment a young man who may be called to preach the gospel. If the Lord said, I expect you to produce fifty years’ worth of sermons in your lifetime, that young man would probably collapse immediately. Rather, the Lord in His mercy says, “I set before you the goal of preaching the gospel as long as you are alive, as effectively and irresistibly and powerfully and plainly as you can.” That’s a goal a person can begin to pursue. And if he lives long enough, he’ll have sermons for fifty years.
The end goal of a lifetime of preaching, however, is not where this young preacher needs to set his eyes. He needs to say, “What is the best possible sermon I can preach next Sunday? What does the Lord want to say through me to the people in my church this week? The preacher is likely to have the faith to believe God for a good sermon this week and next week and the next week and the next week, one at a time.
You need to focus your faith on your immediate and short-range goals.
Your faith will be most effective and potent there. And over time, your faith will be strengthened so that your immediate and short-range goals become more challenging. Only as you look back will you be able to say, “I lived by faith.” And that, of course, is precisely the way the Lord calls you to live:
The just shall live by faith. (Heb 10:38)
We walk by faith, not by sight. (2 Cor. 5:7) The life which I now live in the flesh I live by faith in the Son of God, who loved me and gave Himself for me.