We are always more anxious to be distinguished for a talent which we do not possess, than to be praised for the fifteen which we do possess. Sometimes we are too close to the scene, to see clearly. We "know" ourselves so well that we cannot see how we are perceived by others. Our opinion of ourselves is only "one" opinion and it may not be the truth.
Sometime, somewhere you take something to be the truth. But if you cling to it too strongly, then even when the truth comes in person and knocks on your door, you will not open it.
Keep away from people who try to belittle your ambitions. Small people always do that but the really great make you feel that you too can become great. When you are seeking to bring big plans to fruition it is important with whom you regularly associate. Hang out with friends who are like-minded and who are also designing purpose-filled lives. Similarly be that kind of a friend for your friends.