The history of a bird is the history of a believer. First in the nest, served by parents; then when fledged, learning to do for others what has been done for oneself. First served, and then, in the power and enjoyment of it, serving. There can be no question that it is the duty and calling of each to serve in some way. But it may not be so easy to find out your specific and proper duty or mission; and this is often the excuse for doing nothing.
I do not believe it would be found to be so difficult if you were really fit in heart to enter on service. I believe you would find out your mission if you simply occupied yourself with whatever came to your hand for the Lord. It might begin by carrying food to a sick child, or reading to an old saint.
There is a serving of one's time; that is, you will not be entrusted with very great works until you have proved your competency in small ones. It is impossible but that a star must shine, and it is equally so, that if your eye were single, your whole body would be full of light. The cause of idleness, or ignorance of one's mission is, either that one is not fit for it, or not free and humble in heart enough to begin at the little works appointed for one to do. It is a universal principle—"He that is faithful in that which is least is faithful also in much: and he that is unjust in the least is unjust also in much."