Knowledge of the meaning of the shahadah, its negation and affirmation.
Certainty – perfect knowledge of it that counter-acts suspicion and doubt.
Sincerity which negates shirk.
Truthfulness that permits neither falsehood nor hypocrisy.
Love of the shahadah and its meaning, and being happy with it.
Submission to its rightful requirements, which are the duties that must be performed with sincerity to Allāh seeking His pleasure.
Acceptance that contradicts rejection.