Tehillim 119:4 atah tzivitah fikudeicha lishmor meod
You have ordained Your commands, that we should observe them diligently.
King David now goes on to explain why the Holy One has commanded that we fulfill 613 Mitzvot. If when we simply
"do no wrong," we also
"walk in His ways" (v119:3). Why has the Holy One commanded that we fulfill 613 mitzvot? The answer is,
"You have ordained Your commands, that we should observe them diligently." When there are many mitzvot to keep, there are always occasions for performing any number of them!
It is
"that we should observe them diligently" in order to make them part of our souls. Thereafter, we will perform them with heart and soul.
Tehillim 119:3
Tehillim 119:2
Tehillim 119:1
MeAm Lo'ez
Chazal