It is narrated from Sayyiduna Imran bin Husayn (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) was asked: "Have the people of Paradise been known from the people of Hell?" He (peace and blessings be upon him) said: "Yes." It was asked: "Then for what do those who act, act?" He (peace and blessings be upon him) said: "Everyone acts for that for which he was created, or for that which has been made easy for him."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15363