Endurance is an abstract noun that can be translated as a verb. Here it is a metonym for the person who endures. You may need to make explicit what it is that a person endures. Alternate translation: "We develop character when we endure hardship" (See: [[rc://en/ta/man/translate/figs-abstractnouns]] and [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-explicit]])
"having characer helps us to hope." Here the word "hope" is a person's confident expectation that what he desires really will happen, and it refers to the confident expectation that God will fulfill all his promises. The abstract noun "hope" can be translated here with the verbs "wait confidently" or "trust". Alternate translation: "character helps us to wait confidently" or "character helps us to trust God" (See: [[rc://en/ta/man/translate/figs-inclusive]])