1) Purification of intention is essential for acceptance of deeds. Intentions should be purely for Allah alone, without seeking praise, blame avoidance, or worldly gains.
2) Ikhlas, or sincerity, means purifying the heart and intention from all motives other than seeking Allah's pleasure. One must strive to renew their intention before and during deeds.
3) A believer is rewarded based on their intention. Deeds done sincerely for Allah alone will be accepted, while those mixed with other motives may not.