When do things move faster? Day or night?

In the excerpt of puck’s speech shown here, how many couplets do you see? if we shadows have offended, think but this, and all is mended, that you have but slumber'd here while these visions did appear. and this weak and idle theme, no more yielding but a dream,

What language device is used in the highlighted text?

What parts of hamlet’s soliloquy support a more negative outlook on life?