wariness

The quality or state of being wary; care to foresee and guard against evil; cautiousness. «An almost reptile wariness.» G. W. Cable.

To determine what are little things in religion, great wariness is to be used.

Syn. -- Caution; watchfulness; circumspection; foresight; care; vigilance; scrupulousness.

noun

1. The condition of being alert: alertness, vigilance, wakefulness, watchfulness. See awareness/unawareness.
2. Careful forethought to avoid harm or risk: calculation, care, carefulness, caution, chariness, gingerliness, precaution. See fear/courage.

Definition: caution
Antonyms: recklessness

n

Definition: suspicion
Antonyms: trust

The noun has one meaning:

Meaning #1: the trait of being cautious and watchful
  Synonym: chariness
  Antonym: unwariness (meaning #1)