Rebbe Meir of Premishlan zt'l related the following: "I was once on a wagon, together with my rebbe, Rebbe Mordechai of Kremnitz zt'l. We were riding down a steep hill, and I was afraid the wagon would turn over. I wanted to jump off the wagon, but Rebbe Mordechai of Kremnitz grabbed me with his holy hand and said, 'Stay here. Nothing will happen.' And, indeed, we passed this steep mountain in peace. Later, we were riding on a straight plane, and the wagon turned over, and we were thrown into the snow. The Kremintzer said, 'Nu, nu. Now you see,' but I didn't know what he meant. I thought about his words many times, and I tried to understand what my rebbe was telling me. What did I see? Years later, I understood that he was teaching me a lesson in avodas Hashem. Sometimes a person is afraid that he might fall into the trap the yetzer hara placed in front of him. When one is afraid, Hashem helps him, and he won’t fall into the yetzer hara's hands. But there are times when a person feels he is going on a safe road and doesn't realize that the yetzer hara is plotting against him. That is when he is in danger of falling into the yetzer hara's net.