A Chok (a Torah decree) is a law whose reason is not revealed to us. For example, in the case of this Parasha, the laws of the Red Heifer, Shaanetz (the prohibition against mixing wool with linen), and Kasherut...

"Obey without question"

Although the motives for all mitzvot are beyond our understanding, some reasons for certain mitzvot have been revealed while others have not. Thus, we see that the Mitzvah of the Red Heifer purifies the impure while simultaneously defiling the pure. This is certainly impossible to understand and teaches us that all mitzvot are beyond our understanding. (Likutey Halachot)

The Red Cow that purified even the worst of the impure, but after the destruction of the temple, the service of the Red Cow was annulled. Today, it is possible to obtain forgiveness through our prayers.

The Cow represents prayer in particular, as this writing: "We will offer (the words) of our lips instead of cows" (Hoshea 14,3) Thus, the Red Cow purification ceremony is reflected in our prayers today.

It is written:

The color red indicates judgment, since red is the superior color of the Guevura, which is associated with judgment. The Zohar teaches that the Red Heifer's power to purify comes from the Guevara.

It is also written:

"That it has no defect" A person must turn to the Creator in prayer and accept that the Creator's judgments are righteous. By doing so, the intensity of judgments against him diminishes and he achieves a state of purity.

And he also says:

It is necessary to have complete faith in the Creator, free from the yoke of the idolatry beliefs of other nations.

In conclusion, we must be faithful to the Creator, just like a child who obeys his father with all his heart, with love and without questioning why he does it.