"If it is to be, it is up to me."
It means it is up to me to work hard to achieve my goals in this life time. When it comes to physical and educational life it is up to me to work hard not nobdy ealse but me.
“Nothing can stop people with the right mental attitude from achieving their goals.” - Thomas Jefferson.
This means nobody can stop a person from achieving their goal, you can't bring a person down in make them stop doing whats good fro them just because you not doing good in your life in you not achieving your goal the only way you can be achieving your goals if you work hard do whats best for you and don't listin to what people tell you because they just trying to bring you down with them so do your best and started achieving your goals.