Chapter 18; v.4

אֶת־מִשְׁפָּטַי תַּֽעֲשׂוּ וְאֶת־חֻקֹּתַי תִּשְׁמְרוּ לָלֶכֶת בָּהֶם אֲנִי יְהוָֹה אֱלֹֽהֵיכֶֽם

You shall do my judgments, and keep my ordinances, to walk with them; I am the Lord your God.

It is not enough for one merely to study Torah and observe the Mitzvot in a mechanical manner, which is habitual and routine. We are commanded to renew our enthusiasm and rekindle our efforts daily. The verse describes our involvement in terms of a commitment to “walk, ללכת, with the Torah”. The word ללכת implies movement. We must always be moving and growing, always striving to elevate ourselves to a higher level. (Chatam Sofer)

Chapter 19;v.2

דַּבֵּר אֶל־כָּל־עֲדַת בְּנֵֽי־יִשְׂרָאֵל וְאָֽמַרְתָּ אֲלֵהֶם קְדשִׁים תִּֽהְיוּ כִּי קָדוֹשׁ אֲנִי יְהוָֹה אֱלֹֽהֵיכֶֽם

Speak to all the congregation of the people of Israel, and say to them, You shall be holy; for I the Lord your God am holy.

The Chatam Sofer states: “Since separation leads to holiness, one might say: ‘I will separate myself from humanity and I will be holy by myself, and what do I care about other people!’ Therefore, the verse says: ’speak to all the Congregation of the Children of Israel…you shall be holy’, to teach us that it is impossible to be holy and separate. One cannot reach his potential of holiness unless he considers himself to be part of the Community of Israel.”(Rabbi Mordekhai HaCohen)

“כל עדת” – אומר החת”ם סופר: הואיל ופרישות מביאה לידי קדושה, שמא יאמר אדם הריני פרוש מן הבריות ויהא קדוש שרוי בתוך מעי ועל האחרים מה איכפת לי. הלכך הוא אומר: “דבר אל כל עדת בני ישראל…קדושים תהיו”, ללמדנו שאי אפשר להיות קדוש ופרוש אלא עם הצבור, שאין קדושה בפרט אלא מה שבכלל ישראל.