God commanded us to do the mitzvot and Talmud Torah is considered on the highest level. Why is this the case? And why should one learn torah?

I have a feeling that this question will be voted to be closed, so let me know how I can improve it.

God commanded us to do the mitzvot and Talmud Torah is considered on the highest level. Why is this the case? And why should one learn torah?

The sages provide various reasons for the different mitzvot - I am looking for the reasons for Talmud Torah.