Lech Lecha - Don't SAY Thank You
We find a few times in this parsha ויבן שם מזבח - Avraham built numerous altars, one for each prophecy of good news. R' Gamliel Rabinovich points out the clear message that it does not suffice to just yell or sing "TYH" (or a bumper sticker, rubber band or ____________ (fill in the blank). Something has to be DONE!
Additionally, Avraham didn’t just do a passing act but built something of permanence. It also wasn't מצבות - one stone monuments that he erected, but מזבחות that are built up.
Megillas Ta'anis was a recording of the days that we may not fast or say Tachanun due to various miracles that occurred on many different dates throughout the years. It was dissolved because there were so many miracles, that we could never fast!
Baruch Hashem the lovingkindness that each of ourselves and our families experience are so abundant, it would certainly be difficult to build so many structures as our thankfulness should demand.
But we are not excused.
Very small permament commitments have the same effect. They amass a huge structure built of so many deeds! Each new small commitment becomes its very own מזבח that elevates us to serve Hashem more intimately than before. We are Olah as Korbanos Shelamim upon those altars we build.
Thank Hashem! - And build your own Mizbe'ach.