Kedusha

This shabbos my kallah and I were learning Rav Pinkus zt"l on the parsha and he commented on the Rashi that says HaShem showed Moshe Rabbeinu a "coin of fire" to teach him what the machatzis hashekel looked like. Rav Pinkus explains that just like fire doesn't mix with anything, it consumes it, so too our tzeddaka must be 100% pure in order to be deemed "holy". If we use our money for both kedusha and chol it shows that the kedusha itself is lacking.
Everything that HaShem gives us in this world must be used 100% for kedusha or else it is as if it is being used 0% for kedusha. If I'm just as willing to give money to tzeddaka as I am to use it for talmud Torah or a television or a fancy car, clearly the tzeddaka and talmud Torah are on no higher a level in my mind than the television or car.
We can apply this idea to pretty much everything in our daily lives. If we want to live a life of kedusha then it has to be all consuming. We can't have kedusha in the morning and chol in the afternoon. Torah U'Maddah can't be two distinct endeavors unrelated to each other. It must be Torah le'shaim kedusha and Madda le'shaim kedusha. The madda cannot stand on its own two feet. It must be an intrinsic part of the kedusha of our lives.