Are deeds a condition for the validity of faith or a condition for its perfection?

Question:
Allah has informed us whether what is believed in is a condition for the validity of faith or a condition for its perfection? What is the position of the people of the Sunnah regarding this? And what is the position of the Khawarij and the Murji'ah regarding this issue?

Answer:
This issue requires a book and lessons. Not just lessons. Deeds are included in the definition of faith, so there is no faith without deeds, no faith without deeds, and no deeds without faith. Both faith and deeds are necessary. Therefore, faith without deeds is of no benefit, and deeds without faith are of no benefit. The combination of both, faith and deeds, is necessary. For this reason, the people of the Sunnah said that faith is speech with the tongue, belief in the heart, and action with the limbs. This is faith. It is not merely speech with the tongue, nor merely belief in the heart, nor merely action with the limbs, but rather the presence of all three is necessary for it to be faith.