Answer:
Ralph saw the castle as a dead and hopeless rock while Jack was very optimistic about it
Step-by-step explanation
Ralph and Jack had a different vision for the castle rock. On one hand Raplh was not at all excited about the castle rock while on the other hand Jack was extremely hopeful about the castle rock. Ralph complained about no availability of resources such as fuel, fire, water , coral etc. on the castle rock while Jack liked the vantage point over the island and he could realize the power a castle rock could give him