Here's a little mathematical formula that might help you answer these questions:

If:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

is represented as:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26.

Then:

H-A-R-D-W-O-R-K

8+1+18+4+23+15+18+11 = 98%

and

K-N-O-W-L-E-D-G-E

11+14+15+23+12+5+4+7+5 = 96%

But,

A-T-T-I-T-U-D-E

1+20+20+9+20+21+4+5 = 100%

And,

B-U-L-L-S-H-I-T

2+21+12+12+19+8+9+20 = 103%

AND, look how far ass kissing will take you.

A-S-S-K-I-S-S-I-N-G

1+19+19+11+9+19+19+9+14+7 = 118%

So, one can conclude with mathematical certainty that While Hard work and Knowledge will get you close, and Attitude will get you there, it's the Bullshit and Ass kissing that will put you over the top.