You may be reading this article because somehow, the above statement resonates with you. Perhaps you're hyper-aware of your "lack of knowledge" or perhaps others make you feel so. Or, circumstances and the universe just seem to be giving you that message.
And, you might feel guilty or bad about not knowing as much as you think you should. Also, you might feel jealous that other people know more than you. So, let's tackle these feelings one by one.
First, we will never know everything - no one will ever know everything. That's why we have jobs where we focus on one area of expertise, anyways. So this way of looking at knowledge can make you feel hopeless, or, on the contrary, light! It lifts the pressure of having to know everything under the sun. If we take this as a weight off of our shoulders, then, we have more cognitive energy available to focus and understand. That means less time obsessing over what you can't do and focusing on what you can learn to do.
When there's someone who you admire for knowing a lot and practicing their craft well, you're more inclined to take in what you observe about them and channel that into ways of being better. Rather than put yourself down, you take what you see and use it to better yourself, and that makes you powerful.
And, to protect yourself from only focusing on how others do things well, take some time - whether it's five minutes a day or a few times a week - to acknowledge everything that YOU know. As people, we often discount our attributes as throwaway features and something not out of the ordinary. At the same time, though, we fail to see that what we can do, others are only dreaming of doing.
And what you're doing now, you have already dreamt of doing. Your dreams of the past are now the reality of your present.