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.
Observe and learn from stronger and better people than yours instead of laughing and pulling legs of poor and weak than yours.
Don't care about *new* mistakes you are going to make, take care that you don't just repeat older ones.
Imagination is reality in one's mind waiting to come out at right time with enough efforts.
Get out of failure-o-phobia to enjoy success-o-mania.