I am strong in spirit but now I need to be strong in health

It is a must.
I have tried before but it has not been my main aim, a strong force as the only thing I need for success. But now, I perceive it fully that I need to be strong at any price to stand up with the pressure.
That is the only missing gap in my power to succeed. The only gap I miss.
I do not need to study well but I need to be strong.