What is Shreyas and Preyas? Asked Nachiketa to the Lord of death

 Kathopanishad says that every person will always get the option of treading the path of that which is right & good – the Sreyas, or succumb to the path of immediate pleasure – the Preyas. Those who choose the path of Sreyas will make the best of their lives, while those to succumb to the latter will have to pay the price destined for the deluded ones.    http://www.vmission.org.in/vedanta/articles/spreyas.htm