Trust me when you love something you don't need motivation.
Eat a lot and train hard, I am sure that you will succeed.
I do for one full hour non-stop of 2,000 sit ups and then 6 sets of leg rise.
I love to be sore and when I feel sore I train even harder.
A bodybuilder is a sculptor who carries with him his own material.
If you don't like don't do it. But don't forget that: NO PAIN NO GAIN.