Devar Torah on the Parsha from Rav Eybeshutz

תַּחַת אֲשֶׁר לֹא עָבַדְתָּ אֶת ה' אֱלֹקִיךָ בְּשִׂמְחָה וּבְטוּב לֵבָב מֵרֹב כֹּל. Because you did not serve Hashem, your G-d, with joy and with a good heart, while you had abundance of everything. – Devorim 28:47

In Ya'aros D'vash (part 1, drush 11) Rav Eybeshutz expounds on this verse, and in the name of the Arizal, Rav Eybeshutz writes that each Jew needs to have joy when doing any mitzva. Rav Eybeshutz then gives an advice of how to reach that joy: Before performance of a mitzva think how it is such an incredible honor that the Master of the Universe asked you personally to do this action for Him.