The way most people experience joy in the present is through baseless expectations based on wishes about the future. To the extent your expectations about the future are false, your present joy will be robbed from you and exact an emotional penalty that exceeds any benefit your false joy provided.
Accurate anticipation of the future holds the promise of greater present joy with fewer disappointments. Your ability to trust in your belief that your present actions will yield the future outcomes you predict will determine how much enduring joy you will bring forward into the present. The unwillingness of normal people to make and live plausible long-term plans precludes them from experiencing the greater portion of joy here and now. Meanwhile, surprises in one’s expectations of reality are almost always of the type that cause negative feelings until and unless one becomes so acclimated to the process of learning that they interpret discovery of their own previous limits in a positive light.