All 3 Uses

positive
in
Dark Witch
(Auto-generated)

"This is just the next of it," he told her, "and I'd say having a good horse is a positive thing."
p. 95.3

positive = good or beneficial
"It's faith, and faith's a strong, positive thing."
p. 314.5 *
You'll learn a protection spell, and with this, you'll learn to sweep away the negative energies, the films and dusts of dark forces and lay in the strong, the positive.†
p. 179.5 *

Definitions:

(1) (positive as in: I'm absolutely positive!)
certain (having no doubt; or used for emphasis)
(2) (positive as in: had a positive effect)
good or beneficial
(3) (positive as in: positive feedback from my boss)
approval or agreement
(4) (positive as in: a positive attitude)
optimistic (expecting or focusing on good things); or agreeable
(5) (positive as in: The test came back positive.)
found a condition or substance to be present
indicating the presence of something being tested for -- especially a disease, condition, or substance
(6) (positive as in: a positive number)
greater than zero (of a number)
(7) (meaning too rare to warrant focus)
See a comprehensive dictionary for less common meanings of positive including some in the fields of electricity, physics, chemistry, medicine, philosophy, and grammar. Note that most all senses of positive indicate that something is good or present.