Knowledge is not the thing to boast or to brag! It's about how you can make influence on lives without uttering a single word.
Imagination is reality in one's mind waiting to come out at right time with enough efforts.
Don't care about *new* mistakes you are going to make, take care that you don't just repeat older ones.
Get out of failure-o-phobia to enjoy success-o-mania.
Observe and learn from stronger and better people than yours instead of laughing and pulling legs of poor and weak than yours.