But it is still good to set a goal...

Setting goal may invite another challenge. But it is still good to set a goal than setting no goal and inviting no challenge. Whether I invite or not, challenge comes anyway. And if I am ready for the challenge, most likely I will overcome it and I can grow. The more challenges come, the more challenges I appreciate, then the broader my heart becomes, which would give me happiness, and happiness to my audience. And my audience is--God.
In fact, I am meant to grow a lot during my short lifetime. No time to waste. Anyway, God knows where I should go, and thus it is good to set a goal together with him. Then my goal is his goal and we together will enjoy the process of accomplishing the goal.
Life is so short, you must enjoy it. And there is a reason why this amazing opportunity of life is given to me. Blessing accompanies expectation, and responsibility. I owe so much to God, as well as to all mankind.