Use parallel construction, that is, a consistent form, when listing several ideas.
Correct: Pat respects people who are honest, reliable, and sincere.
(The verb are makes sense with each of the three adjectives at the end of the sentence.)
Incorrect: Pat respects people who are honest, reliable, and have sincerity.
(Here, are does not make sense with have sincerity, and the noun sincerity is not parallel with the two adjectives honest and reliable.)