For 23 years, Tunisians prayed in fear. They limited their visits to the mosque. They talked to no one. Women could not wear the veil on the street and men could not wear long beards for fear of arrest. On Friday, for the first time since the overthrow of secular ex-president Zine al-Abidine Ben Ali, Tunisians attended their weekly sermon without fear that this public expression of piety would cost them their jobs or their freedom.“We couldn’t pray freely before,” Abdel Kouki, 57, said outside the Quds mosque in the Tunisian capital as hundreds of men, most in suits or jeans, streamed into the small mosque.