Don't put all your trust in a mentor on achieving your goals in life, it is because your mentor and you had different situation that has also a different solution, so i think we need to have faith in our own self capacity to pursue our dreams not just trusting our future to others or to mentors hand.
Sometimes it is good to always believe in yourself, without relying on the mentor who guides us, but it all depends on a person's belief in achieving their goals. If the goals that are applied are far different from your mentor's and feel unsuitable, then self-belief needs to be applied because the mentor's views are sometimes different from the beliefs that we feel.