Netzavim-Vayelech : instincts

The parsha says

יא כִּי הַמִּצְוָה הַזֹּאת, אֲשֶׁר אָנֹכִי מְצַוְּךָ הַיּוֹם--לֹא-נִפְלֵאת הִוא מִמְּךָ, וְלֹא רְחֹקָה הִוא.

11 For this commandment which I command thee this day, it is not too hard for thee, neither is it far off

יד כִּי-קָרוֹב אֵלֶיךָ הַדָּבָר, מְאֹד: בְּפִיךָ וּבִלְבָבְךָ, לַעֲשֹׂתוֹ. {ס}

14 But the word is very nigh unto thee, in thy mouth, and in thy heart, that thou mayest do it. {S}

There is torah that requires no study, no teaching. You know that it is right when you say it and do it and feel it. There is an inate sense of the right. there is an obligation to satisfy it.

But the beginning of the parsha admits of ambivalence:

יח וְהָיָה בְּשָׁמְעוֹ אֶת-דִּבְרֵי הָאָלָה הַזֹּאת, וְהִתְבָּרֵךְ בִּלְבָבוֹ לֵאמֹר שָׁלוֹם יִהְיֶה-לִּי--כִּי בִּשְׁרִרוּת לִבִּי, אֵלֵךְ: לְמַעַן סְפוֹת הָרָוָה, אֶת-הַצְּמֵאָה.

18 and it come to pass, when he heareth the words of this curse, that he bless himself in his heart, saying: 'I shall have peace, though I walk in the stubbornness of my heart--that the watered be swept away with the dry';

Who knows what evil lurks in the hearts of men?

28 The secret things belong unto the LORD our God; but the things that are revealed belong unto us and to our children for ever, that we may do all the words of this law.

When it comes to your instincts:

Trust, but verify