Luck is always there, you're always luckier than someone else. It's just your hard work that determines how
effective your luck will be. Some people are luckier than others (like me -.-' just that i don't work at all..
so.. -.-') and you can attribute that to karma or whatever if you can't deal with it :P
"three rules for mangakas who are not geniuses; 1) be conceited 2) be hardworking 3) be lucky." from
Bakuman
by conceited, he meant have confidence in yourself.. more and more, and work more and more so that you can back it up.
And sometimes, in spite of everything, luck just betrays you. But don't feel like your hard work was wasted, had
you not worked hard, your luck would have had been worse.
also
"when you want something, all the universe conspires in helping you to achieve it." -Paulo Coelho, The
Alchemist
all that just depends on how badly you want it.
So hard work is necessary, whether you're lucky or not, cuz that's what is in your hands. Luck is not a thing
you can control. But yes, without luck, it's very difficult to succeed.