Piety and Sins
Shaykh Ibn al-Qayyim (may Allah have mercy on him) said:
“Some people think that one who has no sin is godly. This is a misunderstanding of piety . A pious person is one who carefully treats his religion and observes the ordinances of the Almighty, even if sometimes he does what for which he brings repentance to Allah. This circumstance in no way denies the presence in a person of faith, piety and the possibility of being a pleaser and beloved of Allah. “
See Miftahu Dari-sSa’ada 1/163.