The Talmud teaches us (Berachot, 21a) that the requirement to say a blessing after a meal comes from a verse in the Torah (Deuteronomy 8:10), and to recite it before the meal comes from a logical imperative. But the reverse is true with Torah study; the source for reciting a blessing before is from a verse (Deut. 32:3).
We all know people whose natural inclination is “No.” They avoid setting precedents, take no chances, play it safe, and squelch initiative. But the Jewish People did not make it this far by saying “No” to everything. We made our mark by a repetitive and massive “Yes.” Even when the odds were against success, we insisted that we couldn’t afford not to try.