When Hashem revealed Himself to Moshe in the bush, Moshe didn't want to look at Hashem. Later, Moshe requested, (Shemos 33:18) ֶָךכְּבֹד ֶתא נָא ֵנִיַרְאה, "Show me now your glory." The Gemara (Brachos 7.) says that Hashem replied, "When I wanted, you didn't want. Now that you want, I don't want."
Reb Tzvi Meir Zilberberg Shlita says that we can learn from this the importance of taking advantage of an eis ratzon. When there is a special time that Hashem shines His face onto us, we should grab the opportunity. Otherwise, Hashem might say, "When I wanted, you didn't want, and now that you want, I don't want."
On this Motzei Shabbos, the six weeks of Shovavim begin. The holy sefarim say that saying Tehillim and learning Torah with hasmadah during these weeks purifies us immensely from severe aveiros. When we have the opportunity, we should grasp it. Otherwise, Hashem might say, "When I gave you the opportunity, you didn't want it, and now I don't want to."
Reb Tzvi Meir tells a story that happened with the Shinover Rav zt'l. An elderly person was waiting in line to speak with the Shinover Rav. The person before him was a yungerman who didn't yet have children. The line began outside the Shinover Rav's room and continued into his room. The elderly man was already in the Rav's room, waiting in line when the yungerman in front of him was speaking with the Shinover Rav. This elderly man overheard the yungerman tell the Shinover Rav that he was many years after his chasunah and still doesn't have children. The Shinover Rav went into a state of deveikus; it appeared like he was sleeping. The yungerman was tired from the trip and went off to the side, sat down, closed his eyes, and fell asleep.
The Shinover Rav awoke, opened his eyes, and said, "This year, you will have a boy. Mazal tov." The yungerman who had presented this request no longer stood before the Shinover Rav. He had moved to the side of the room to close his eyes and to rest. The second person in line, the elderly Yid, received the brachah to bear a child! Indeed, a year later, he had a son.
The person lying on the side of the room awoke just then. He rushed over to the Shinover Rav and explained that he was the one who gave the kvitel with the request for children, and he should receive the brachah for children. The Shinover Rav answered that the bracha was already given to someone else, and he couldn't help him now. (Reb Meir Tzvi heard this story from an elderly Yid, who heard it from the elderly Yid of the story who received the brachah from the Shinover Rav for children.)
The lesson from this story is that when it is a special time, don't squander the opportunity with sleep.
