Have pure intentions in all your actions .

This hadith explains that when a person does something good or bad, their intentions behind it will determine the reward or punishment they receive. For example if someone emigrates to another country for Allah's sake and His Apostle's sake then their emigration is considered an act of worship and they will be rewarded accordingly. However if someone emigrates for worldly benefits such as money or to marry a woman then their intention was not pure and so they will not receive as much reward from Allah. This teaches us that we should always strive to have pure intentions in all our actions so that we can be rewarded by Allah in this life and the hereafter.