Little Things but Great Significance-Impression on Oil Painting

Even though I have ended my student life two years before, I dream of my university life as usual. Professors, my dear fellows and faculty building are the common subtle things come up in my dream very frequently. Every time I come back to our old dear faculty building in my dream, oil paintings on the wall along the stairs is the first souvenir to welcome me. Just like my good old friends, although it cannot speak, I can receive tender feelings it brings to me. Here I think of a pretty vivid thing in my university time.  
That was the end of the fifth semester in my university time, and in the examination week we were suddenly told that a reciting exam would be added in the compulsory exams. All the guys were in chaos because we were given a pamphlet with fifty essays which were required to keep in heart. The black day came ultimately; none of us was in his or her normality. When we were waiting to be called like stiff stones, a vivid fellow bursted into laughter and said, "Look, the old chap in the oil painting is so funny!" Nearly all the ones' attention altered to the old man portrait oil painting at once. And then we began to talk about these paintings; spontaneously the tense atmosphere was dissipated.
Of course, at last all of us got through the occasional disgusting exam under a threatening but no dangerous situation. Now whenever I meet with trouble, the amusing old man in the oil painting will appears in my mind seemingly saying "take it easy" to me.