Tzaddik's Blessing

Moses’ blessings were limited and G-d’s are limitless. Why would Moses bother blessing us?

Thank you very much for giving me the possibility to bless a Jew. May G-d Almighty bless you to do even better, and have good news. The main thing is that the blessings should be fulfilled. May G-d bless you that you will thank Him at age 120. (Collage)

I see that my father-in-law, the Rebbe’s, blessing succeeded. May it continue to succeed for many healthy years.

There are numerous references to the concept of blessings in this Torah portion. What is the special power of a blessing?