Sincerity

Sincerity [sidq] manifests at once through verbal articulation, inner conviction, and tangible action. It is the product of a heart full of certitude, an idea striving to find expression through unrelenting, constructive action.
Hypocrisy and base sentiments hold a large position in the societies of jahiliya and fitna. Training the Islamic personality distinguishes the sincere from the liars, the true from the false. Any Muslim willing to join our ranks must provide evidence of his sincerity before being considered as a true believer committed to serve the cause of the ummah.
Sincerity means to have the good will and the unshakeable readiness to serve the cause loyally and unconditionally in the ranks of the believers.