רַק֩ חֲזַ֨ק וֶֽאֱמַ֜ץ מְאֹ֗ד לִשְׁמֹ֤ר לַעֲשׂוֹת֙ כְּכָל־הַתּוֹרָ֗ה אֲשֶׁ֤ר צִוְּךָ֙ מֹשֶׁ֣ה עַבְדִּ֔י אַל־תָּס֥וּר מִמֶּ֖נּוּ יָמִ֣ין וּשְׂמֹ֑אול לְמַ֣עַן תַּשְׂכִּ֔יל בְּכֹ֖ל אֲשֶׁ֥ר תֵּלֵֽךְ׃
Solamente te esfuerces, y seas muy valiente, para cuidar de hacer conforme á toda la ley que mi siervo Moisés te mandó: no te apartes de ella ni á diestra ni á siniestra, para que seas prosperado en todas las cosas que emprendieres.
Tze'enah Ure'enah
“But be strong and resolute” [1:7]. But be strong in the Torah, as Moses had taught you, in the expectation that you will have good fortune, blessing, and success in all your paths. However, study day and night so that the Torah will never be removed from your mouth.
Rashi
Just be very strong and courageous. This was said in reference to the Torah, as He states: ‘To preserve, to act in accordance with all the laws of the Torah.’
Rashi
תַּשְּׁכִּיל—You will be successful.13People consider that a successful person is a smart person. That is why the word תַּשְׂכִּיל—is associated with the word תַּצְלִיחַ. (Metsudas Tzion).