Why did Isaac want to bless Esau instead of Jacob? Jacob was "a pure man, a dweller in tents (of Torah)" and even without a blessing he would stay away from evil. Esau, however, was very likely to fall into bad ways, and needed the assistance of his father's blessing. (Ohr HaTorah)
Reprinted from the Parashat Toldos 5763/2002 edition of L’Chaim