Instruction should not be about dribbling drops of knowledge that students collect as they move from course to course. It should be more like gathering kindling, letting students play with matches, encouraging them to take risks and hoping that for some the materials burst into flames and become lifelong interests. 

This won’t happen to every student in every class. It won’t necessarily happen when students or professor expect it to. But if it happens occasionally it makes a good quality education worthwhile.

I would like to add a famous poem of W.B. Yeats below this post; in this poem you see his unrequited love..

he wishes for the cloths of heaven

had i the heavens’ embroidered cloths,
enwrought with golden and silver light,
the blue and the dim and the dark cloths
of night and light and the half-light,
i would spread the cloths under your feet:
but i, being poor, have only my dreams;
i have spread my dreams under your feet;
tread softly because you tread on my dreams.