In the Katha Upanishad, the concept of shreyas and preyas are discussed in detail. Shreyas means that which is good, beneficial and conducive to well-being in the long run. Preyas means that which is only attractive and provide momentary joy, but is harmful in the long run.

Human beings are naturally attracted towards the pleasant, and care less about what is good and correct. But to become great leaders, we should differentiate between Shreyas & Preyas, and relate them to the decision making elements in our lives. Our goal should be to embrace Shreyas, and dump Preyas.

Here is a translated excerpt from Katha Upanishad.

The better is one thing, the dearer is another thing; these two bind a man in opposite ways. Of these two, it is well for him who takes the better; he who chooses the dearer fails of his object.

The better and the dearer approach a man; Going round them, the sage discerns between them. The sage chooses the better rather than the dearer; The fool chooses the dearer, through lust of possession.
(Selections from the Upanishads, pp. 37-38)

Ref: The Vedanta Kesari